163-625: Duolingo, Inc. , is an American educational technology company that produces learning apps and provides language certification . Duolingo offers courses on 43 languages, ranging from English , French , and Spanish to less commonly studied languages such as Welsh , Irish , and Navajo , and even fictional languages such as Klingon . It also offers courses on music and math. The learning method incorporates gamification to motivate users with points and rewards and interactive lessons featuring spaced repetition . The app promotes short, daily lessons for consistent-phased practice. Duolingo also offers
326-518: A gamified approach to language learning, with lessons that incorporate translating, interactive exercises, quizzes, and stories. It also uses an algorithm that adapts to each learner and can provide personalized feedback and recommendations. Lessons are designed to be brief, allowing users to learn in manageable chunks. The app has a personalized bandit algorithm system (later the A/B tested variant recovering difference softmax algorithm ) that determines
489-410: A native development kit (NDK) for applications or extensions in C or C++, Google App Inventor , a visual environment for novice programmers, and various cross platform mobile web applications frameworks . In January 2014, Google unveiled a framework based on Apache Cordova for porting Chrome HTML 5 web applications to Android, wrapped in a native application shell. Additionally, Firebase
652-515: A nonprofit organization , but Von Ahn judged this model unsustainable. Its early revenue stream, a crowdsourced translation service, was replaced by a Duolingo English Test certification program, advertising, and subscription. In October 2011, Duolingo announced that it had raised $ 3.3 million from a Series A round of funding, led by Union Square Ventures , with participation from author Tim Ferriss and actor Ashton Kutcher 's investing firm A-Grade Investments . Duolingo launched
815-408: A weather forecast , the user's email inbox, or a news ticker directly on the home screen. A home screen may be made up of several pages, between which the user can swipe back and forth. Third-party apps available on Google Play and other app stores can extensively re- theme the home screen, and even mimic the look of other operating systems, such as Windows Phone . Most manufacturers customize
978-507: A 2008 study conducted by the U.S Department of Education , during the 2006–2007 academic year about 66% of postsecondary public and private schools participating in student financial aid programs offered some distance learning courses; records show 77% of enrollment in for-credit courses with an online component. In 2008, the Council of Europe passed a statement endorsing e-learning's potential to drive equality and education improvements across
1141-399: A PC and mobile operating system, based on Android, to "compete directly with Microsoft Windows and Google Android". The Chinese Academy of Engineering noted that "more than a dozen" companies were customizing Android following a Chinese ban on the use of Windows 8 on government PCs. Android is developed by Google until the latest changes and updates are ready to be released, at which point
1304-673: A Series E funding round led by Drive Capital , bringing its total funding to $ 108.3 million. The round valued Duolingo at $ 700 million, and the company reported passing 200 million registered users, with 25 million active users. It was reported that Duolingo had 95 employees. Funds from the Series ;E round would be directed toward creating initiatives such as a related educational flashcard app, TinyCards, and testbeds for initiatives related to reading and listening comprehension. On August 1, 2018, Duolingo surpassed 300 million registered users. In December 2019, it
1467-587: A chance to exist in the same room as, and share a dialogue with researchers, politicians, and activists. This is because it vaporizes the geographical barriers that would otherwise separate people. Simplified, social media gives students a reach that provides them with opportunities and conversations that allow them to grow as communicators. Social technologies like Twitter can provide students with an archive of free data that goes back multiple decades. Many classrooms and educators are already taking advantage of this free resource—for example, researchers and educators at
1630-710: A choice of non-default runtimes that allow better C++ support. The SDK includes a comprehensive set of development tools, including a debugger , software libraries , a handset emulator based on QEMU , documentation, sample code, and tutorials. Initially, Google's supported integrated development environment (IDE) was Eclipse using the Android Development Tools (ADT) plugin; in December 2014, Google released Android Studio , based on IntelliJ IDEA , as its primary IDE for Android application development. Other development tools are available, including
1793-511: A class with younger students. Students have access to various enrichment courses in online learning, still participate in college courses, internships, sports, or work, and still graduate with their classes. Computer-based training (CBT) refers to self-paced learning activities delivered on a computer or handheld devices such as a tablet or smartphone. CBT initially delivered content via CD-ROM, and typically presented content linearly, much like reading an online book or manual. For this reason, CBT
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#17327652796991956-458: A classroom, except for listening. Some language professionals have criticized the app for its limitations and gamified design. Others have pointed out that Duolingo and similar apps can be a starting point but lack the human interaction required to be fluent in a language and for real-life conversations. For instance, Bruno Estigarribia stated that, as of 2019, the Guarani course was "seemingly in
2119-511: A constructivist perspective may emphasize an active learning environment that may incorporate learner-centered problem-based learning , project-based learning , and inquiry-based learning , ideally involving real-world scenarios, in which students are actively engaged in critical thinking activities. An illustrative discussion and example can be found in the 1980s deployment of constructivist cognitive learning in computer literacy, which involved programming as an instrument of learning. LOGO ,
2282-565: A development phase" and that it "had many inconsistencies". He added it could serve as a complement to one's studies, but it would not "magically teach" the language. Players have also reported that "gamification" has led to cheating, hacking, and incentivized game strategies that conflict with actual learning. In March 2022, Duolingo forums were discontinued, and Sentence discussions became read-only. The change has been criticized on some social media sites. In January 2023, Duolingo's data on over 2.6 million users' usernames, names, and phone numbers
2445-418: A facilitator, providing guidance so that learners can construct their own knowledge. Constructivist educators must make sure that the prior learning experiences are appropriate and related to the concepts being taught. Jonassen (1997) suggests "well-structured" learning environments are useful for novice learners and that "ill-structured" environments are only useful for more advanced learners. Educators utilizing
2608-407: A fictitious law firm fights for those that have been harmed by Duolingo's owl mascot. This was further referenced by the company in its 2024 April Fools' Day skit "Duo on Ice", in which the owl, in a mix of Spanish and English, admitted to having an appetite for human flesh, and if the user failed to continue their streak, they would "eat their head like a praying mantis ." In February 2020, as part of
2771-487: A figure closer to 60 million users. In June 2015, it announced that it had raised $ 45 million from a Series D funding round led by Google Capital , bringing its total funding to $ 83.3 million. The round valued the company at around $ 470 million, with 100 million registered users globally. In April 2016, it was reported that Duolingo had more than 18 million monthly users. In July 2017, Duolingo announced that it had raised $ 25 million in
2934-402: A fluid touch interface, often using the vibration capabilities of the device to provide haptic feedback to the user. Internal hardware, such as accelerometers , gyroscopes and proximity sensors are used by some applications to respond to additional user actions, for example adjusting the screen from portrait to landscape depending on how the device is oriented, or allowing the user to steer
3097-663: A free language-learning program". Duolingo won Best Education Startup at the 2014 Crunchies , and was the most downloaded 'education app' in Google Play in 2013 and 2014. In July 2020, PCMag named it "The Best Free Language Learning App". As a company, Duolingo has likewise won several awards and recognitions. In 2015, it was announced as that year's Index Award winner in the Play & Learning category by The Index Project . It won Inc. magazine 's Best Workplaces 2018, made Entrepreneur magazine 's Top Company Culture List 2018,
3260-768: A fun way to revise. When the experience is enjoyable, the students become more engaged. Games also usually come with a sense of progression, which can help keep students motivated and consistent while trying to improve. Classroom 2.0 refers to online multi-user virtual environments (MUVEs) that connect schools across geographical frontiers. Known as "eTwinning", computer-supported collaborative learning (CSCL) allows learners in one school to communicate with learners in another that they would not get to know otherwise, enhancing educational outcomes and cultural integration. Further, many researchers distinguish between collaborative and cooperative approaches to group learning. For example, Roschelle and Teasley (1995) argue that "cooperation
3423-433: A given context may refer to theoretical, algorithmic or heuristic processes: it does not necessarily imply physical technology. Educational technology is the process of integrating technology into education in a positive manner that promotes a more diverse learning environment and a way for students to learn how to use technology as well as their common assignments. Accordingly, there are several discrete aspects to describing
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#17327652796993586-459: A high probability of long-term cost-effectiveness. Improved Internet functionality enabled new schemes of communication with multimedia or webcams . The National Center for Education Statistics estimates the number of K-12 students enrolled in online distance learning programs increased by 65% from 2002 to 2005, with greater flexibility, ease of communication between teacher and student, and quick lecture and assignment feedback. According to
3749-586: A keyboard and mouse. In addition to their availability on commercially available hardware, similar PC hardware-friendly versions of Android are freely available from the Android-x86 project, including customized Android 4.4. Using the Android emulator that is part of the Android SDK , or third-party emulators, Android can also run non-natively on x86 architectures. Chinese companies are building
3912-576: A learning system, named Celeration, which was based on behavior analysis but substantially differed from Keller's and Skinner's models. Cognitive science underwent significant change in the 1960s and 1970s to the point that some described the period as a "cognitive revolution", particularly in reaction to behaviorism. While retaining the empirical framework of behaviorism , cognitive psychology theories look beyond behavior to explain brain-based learning by considering how human memory works to promote learning. It refers to learning as "all processes by which
4075-541: A linear progression. This update has been criticized by users across social media outlets, such as Reddit and Twitter . CEO Luis von Ahn stated that there were no plans to reverse the changes—intended to simplify Duolingo for its new users—maintaining both the old and new versions would be difficult. In October 2022, Duolingo acquired Detroit-based animation studio Gunner; it is the studio that produces art assets and animation for Duolingo and Duolingo ABC and its marketing campaigns. In March 2023, Duolingo officially announced
4238-524: A need to further develop educational services across the globe, primarily to developing countries. In 1960, the University of Illinois created a system of linked computer terminals, known as the Intranet, to give students access to recorded lectures and course materials that they could watch or use in their free time. This type of concept, called PLATO (programmed logic for automatic teaching operations),
4401-564: A press conference in a New York City subway station . Since 2008, Android has seen numerous updates which have incrementally improved the operating system, adding new features and fixing bugs in previous releases. Each major release is named in alphabetical order after a dessert or sugary treat, with the first few Android versions being called " Cupcake ", " Donut ", " Eclair ", and " Froyo ", in that order. During its announcement of Android KitKat in 2013, Google explained that "Since these devices make our lives so sweet, each Android version
4564-411: A primary focus on how learners construct their own meaning from new information, as they interact with reality and with other learners who bring different perspectives. Constructivist learning environments require students to use their prior knowledge and experiences to formulate new, related, and/or adaptive concepts in learning (Termos, 2012 ). Under this framework, the role of the teacher becomes that of
4727-658: A private beta on November 27, 2011, and accumulated a waiting list of more than 300,000 people. It launched to the general public on June 19, 2012, at which point the waiting list had grown to around 500,000. In September 2012, Duolingo announced that it had raised a further $ 15 million from a Series B funding round led by New Enterprise Associates , with participation from Union Square Ventures. In November 2012, Duolingo released an iPhone app, followed by an Android app in May 2013, at which time Duolingo had around 3 million users. By July 2013, it had grown to 5 million users and
4890-468: A programming language, embodied an attempt to integrate Piagetian ideas with computers and technology. Initially there were broad, hopeful claims, including "perhaps the most controversial claim" that it would "improve general problem-solving skills" across disciplines. However, LOGO programming skills did not consistently yield cognitive benefits. It was "not as concrete" as advocates claimed, it privileged "one form of reasoning over all others", and it
5053-517: A prominent role in education. From the early twentieth century, duplicating machines such as the mimeograph and Gestetner stencil devices were used to produce short copy runs (typically 10–50 copies) for classroom or home use. The use of media for instructional purposes is generally traced back to the first decade of the 20th century with the introduction of educational films (the 1900s) and Sidney Pressey's mechanical teaching machines (1920s). The first all multiple choice , large-scale assessment
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5216-635: A range of other electronics, such as game consoles , digital cameras , portable media players , and PCs , each with a specialized user interface. Some well-known derivatives include Android TV for televisions and Wear OS for wearables , both developed by Google. Software packages on Android, which use the APK format, are generally distributed through proprietary application stores like Google Play Store , Amazon Appstore , Samsung Galaxy Store , Huawei AppGallery , Cafe Bazaar , GetJar , and Aptoide , or open source platforms like F-Droid . Android has been
5379-748: A significant portion, is delivered by the Internet . "Virtual" is used in that broader way to describe a course that is not taught in a classroom face-to-face but "virtually" with people not having to go to the physical classroom to learn. Accordingly, virtual education refers to a form of distance learning in which course content is delivered using various methods such as course management applications , multimedia resources, and videoconferencing . Virtual education and simulated learning opportunities, such as games or dissections, offer opportunities for students to connect classroom content to authentic situations. Educational content, pervasively embedded in objects,
5542-474: A split-screen view mode are the 2012 Samsung Galaxy S3 and Note 2 , the former of which received this feature with the premium suite upgrade delivered in TouchWiz with Android 4.1 Jelly Bean. When connecting or disconnecting charging power and when shortly actuating the power button or home button, all while the device is powered off, a visual battery meter whose appearance varies among vendors appears on
5705-488: A streak together with their friends, and released math and music courses for Android in September. During Duocon 2024 Duolingo introduced various new features, including Video Call and mini games called Adventures. In October Duolingo introduced Duolingo Score. Duolingo has 44 available language courses. Duolingo Math is an app course for learning elementary mathematics . It was announced on YouTube on August 27, 2022, at
5868-447: A variety of media. Major high-tech companies have funded schools to provide them with the ability to teach their students through technology. 2015 was the first year that private nonprofit organizations enrolled more online students than for-profits, although public universities still enrolled the highest number of online students. In the fall of 2015, more than 6 million students enrolled in at least one online course. In 2020, due to
6031-430: A vehicle in a racing game by rotating the device, simulating control of a steering wheel . Android devices boot to the home screen , the primary navigation and information "hub" on Android devices, analogous to the desktop found on personal computers. Android home screens are typically made up of app icons and widgets ; app icons launch the associated app, whereas widgets display live, auto-updating content, such as
6194-516: A whole lot like the program has wrapped up". From 2008 to 2013, Hugo Barra served as product spokesperson, representing Android at press conferences and Google I/O , Google's annual developer-focused conference. He left Google in August 2013 to join Chinese phone maker Xiaomi . Less than six months earlier, Google's then- CEO Larry Page announced in a blog post that Andy Rubin had moved from
6357-508: A widget feature on iOS and Android. The widget feature initially started as Duolingo's annual hackathon project. The iOS widget has 39 illustrations designed by Kyle Ruane that were intended to be another daily reminder to complete lessons. On the top part of the widgets is the user's daily streak . On the Duolingo Blog, they wrote that they "decided to come up with a series of illustrations that would show Duo’s mood at different parts of
6520-479: Is a 37-key portable digital piano created through a partnership between Duolingo and Loog. It features velocity-sensitive keys, built-in speakers, and ports for USB-C, a sustain pedal , and headphones. The piano is designed to work with Duolingo's music lessons. The Duolingo English Test (DET) is an online English proficiency test that measures proficiency in reading, writing, speaking, and listening in English. It
6683-417: Is a component of the smart city concept. Helping people and children learn in ways that are easier, faster, more accurate, or less expensive can be traced back to the emergence of very early tools, such as paintings on cave walls. Various types of abacus have been used. Writing slates and blackboards have been used for at least a millennium. Since their introduction, books and pamphlets have played
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6846-425: Is a computer-based test scored on a scale of 10–160, with scores above 120 considered English proficiency. The test's questions algorithmically adjust to the test-takers' ability level. The test's certificate is reportedly accepted by over 5,500 programs internationally, albeit with exceptions. On Duolingo, learners learn by engaging with the language. Users complete lessons using words they are learning. Duolingo uses
7009-632: Is a woman and the groom is a hedgehog" or "The man eats ice cream with mustard"—is reportedly derived from research published in 2018 by psychologists at Ghent University in Belgium, which concluded that such "semantically unpredictable sentences" were more effective for language learning than conventional and predictable phrases, based on the concept of "reward prediction errors", in which unexpected or surprising outcomes are more rewarding and thus encourage further learning. A 2022 study on adults using Duolingo as their only language learning tool, published in
7172-460: Is accomplished by the division of labor among participants, as an activity where each person is responsible for a portion of the problem solving", in contrast with collaboration that involves the "mutual engagement of participants in a coordinated effort to solve the problem together." Social technology, and social media specifically, provides avenues for student learning that would not be available otherwise. For example, it provides ordinary students
7335-428: Is all around the learner, who may not even be conscious of the learning process. The combination of adaptive learning , using an individualized interface and materials, which accommodate to an individual, who thus receives personally differentiated instruction, with ubiquitous access to digital resources and learning opportunities in a range of places and at various times, has been termed smart learning. Smart learning
7498-541: Is available in selected courses and markets. Duolingo for Schools is designed to help teachers use Duolingo in their classrooms. It allows teachers to create classrooms, assign lessons, track student progress, and personalize learning. Duolingo ABC is a free app designed for young children to learn letters, their sounds, phonics, and other early reading concepts. Released in 2020, it does not contain ads or in-app purchases. As of April 2024, iOS and Android versions are available, but only in English. The Duolingo x Loog Piano
7661-676: Is descended from those early experiments. Online education originated from the University of Illinois in 1960. Although the internet would not be created for another decade, students were able to access class information with linked computer terminals. Online learning emerged in 1982 when the Western Behavioral Sciences Institute in La Jolla, California, opened its School of Management and Strategic Studies. The school employed computer conferencing through
7824-664: Is expanding its low-cost Android One program into the United States, although The Verge notes that the company will presumably not produce the actual devices itself. Google introduced the Pixel and Pixel XL smartphones in October 2016, marketed as being the first phones made by Google, and exclusively featured certain software features, such as the Google Assistant , before wider rollout. The Pixel phones replaced
7987-438: Is low, the system will begin invisibly and automatically closing inactive processes, starting with those that have been inactive for the longest amount of time. Lifehacker reported in 2011 that third-party task-killer applications were doing more harm than good. Some settings for use by developers for debugging and power users are located in a "Developer options" sub menu, such as the ability to highlight updating parts of
8150-426: Is named after a dessert", although a Google spokesperson told CNN in an interview that "It's kind of like an internal team thing, and we prefer to be a little bit—how should I say—a bit inscrutable in the matter, I'll say". In 2010, Google launched its Nexus series of devices, a lineup in which Google partnered with different device manufacturers to produce new devices and introduce new Android versions. The series
8313-443: Is not found in its ability to establish a method for distance learning, but rather in its power to make this type of learning process more efficient by providing a medium in which the instructor and their students can virtually interact with one another in real-time. The topic of online education started primarily in the late 1900s when institutions and businesses started to make products to assist students' learning. These groups desired
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#17327652796998476-488: Is often more complex than a subject matter expert or teacher is able to use. The lack of human interaction can limit both the type of content that can be presented and the type of assessment that can be performed and may need supplementation with online discussion or other interactive elements. Computer-supported collaborative learning (CSCL) uses instructional methods designed to encourage or require students to work together on learning tasks, allowing social learning . CSCL
8639-610: Is often used to teach static processes, such as using software or completing mathematical equations. Computer-based training is conceptually similar to web-based training (WBT), which is delivered via Internet using a web browser . Assessing learning in a CBT is often by assessments that can be easily scored by a computer such as multiple-choice questions, drag-and-drop, radio button, simulation, or other interactive means. Assessments are easily scored and recorded via online software, providing immediate end-user feedback and completion status. Users are often able to print completion records in
8802-583: Is online and working collaboratively at the same time. Since students are working collaboratively, synchronized learning helps students become more open-minded because they have to actively listen and learn from their peers. Synchronized learning fosters online awareness and improves many students' writing skills. Asynchronous learning may use technologies such as learning management systems , email , blogs , wikis , and discussion boards , as well as web -supported textbooks, hypertext documents, audio video courses, and social networking using web 2.0 . At
8965-513: Is otherwise identical to Duolingo for Schools. Duolingo Max is a subscription above Super Duolingo that adds additional functions using generative AI : RolePlay, an AI conversation partner, Explain My Answer, which breaks down the rules with a modified GPT-4 when the user makes a mistake, and Video Call, where users can have video chat with one of the characters, Lily. Intended to provide further immersion through "free-flowing conversation", it
9128-858: Is primarily developed by Google . It was unveiled in November 2007, with the first commercial Android device, the HTC Dream , being launched in September 2008. At its core, the operating system is known as the Android Open Source Project ( AOSP ) and is free and open-source software (FOSS) primarily licensed under the Apache License . However, most devices run the proprietary Android version developed by Google, which ships with additional proprietary closed-source software pre-installed, most notably Google Mobile Services (GMS), which includes core apps such as Google Chrome ,
9291-540: Is similar in concept to the terminology, "e-learning 2.0" and "networked collaborative learning" (NCL). With Web 2.0 advances, sharing information between multiple people in a network has become much easier and use has increased. One of the main reasons for its usage states that it is "a breeding ground for creative and engaging educational endeavors." Learning takes place through conversations about content and grounded interaction about problems and actions. This collaborative learning differs from instruction in which
9454-2037: Is someone who is trained in the field of educational technology. Educational technologists try to analyze, design, develop, implement, and evaluate processes and tools to enhance learning. While the term educational technologist is used primarily in the United States, learning technologist is a synonymous term used in the UK as well as Canada. Modern electronic educational technology is an important part of society today. Educational technology encompasses e-learning, instructional technology, information and communication technology (ICT) in education, edtech, learning technology, multimedia learning, technology-enhanced learning (TEL), computer-based instruction (CBI), computer managed instruction, computer-based training (CBT), computer-assisted instruction or computer-aided instruction (CAI), internet-based training (IBT), flexible learning, web-based training (WBT), online education, digital educational collaboration, distributed learning, computer-mediated communication , cyber-learning, and multi-modal instruction, virtual education, personal learning environments, networked learning , virtual learning environments (VLE) (which are also called learning platforms), m-learning , and digital education. Each of these numerous terms has had its advocates, who point up potential distinctive features. However, many terms and concepts in educational technology have been defined nebulously. For example, Singh and Thurman cite over 45 definitions for online learning. Moreover, Moore saw these terminologies as emphasizing particular features such as digitization approaches, components, or delivery methods rather than being fundamentally dissimilar in concept or principle. For example, m-learning emphasizes mobility, which allows for altered timing, location, accessibility, and context of learning; nevertheless, its purpose and conceptual principles are those of educational technology. In practice, as technology has advanced,
9617-523: Is the combined use of computer hardware, software, and educational theory and practice to facilitate learning . When referred to with its abbreviation, "EdTech", it often refers to the industry of companies that create educational technology. In EdTech Inc.: Selling, Automating and Globalizing Higher Education in the Digital Age , Tanner Mirrlees and Shahid Alvi (2019) argue "EdTech is no exception to industry ownership and market rules" and "define
9780-517: Is the latest version and includes improvements specific to foldable phones , tablets, desktop -sized screens , and Chromebooks . Android Inc. was founded in Palo Alto, California , in October 2003 by Andy Rubin , Rich Miner , Nick Sears, and Chris White. Rubin described the Android project as having "tremendous potential in developing smarter mobile devices that are more aware of its owner's location and preferences". The early intentions of
9943-537: Is the most popular language learning app. Learners on Duolingo complete more than 13 billion exercises per week. A systematic review of research on Duolingo from 2012 to 2020 found comparatively few studies on the platform's efficiency for language learning but identified several studies that reported relatively high user satisfaction, enjoyment, and positive perceptions of the app's effectiveness. The company has also been recognized for its successful marketing tactics and strong brand engagement . The idea for Duolingo
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#173276527969910106-709: Is the primary application store installed on Android devices that comply with Google's compatibility requirements and license the Google Mobile Services software. Google Play Store allows users to browse, download and update applications published by Google and third-party developers; as of January 2021 , there are more than three million applications available for Android in Play Store. As of July 2013 , 50 billion application installations had been performed. Some carriers offer direct carrier billing for Google Play application purchases, where
10269-530: Is the world's most widely used operating system due to it being used on most smartphones and tablets outside of iPhones and iPads , which use Apple 's iOS and iPadOS , respectively. As of October 2024 , Android accounts for 45% of the global operating system market , followed by Windows with 26%. Android has historically been developed by a consortium of developers known as the Open Handset Alliance , but its most widely used version
10432-473: Is used by default), and adoptable storage. Portable storage is treated as an external storage device. Adoptable storage, introduced on Android 6.0, allows the internal storage of the device to be spanned with the SD card, treating it as an extension of the internal storage. This has the disadvantage of preventing the memory card from being used with another device unless it is reformatted . Android 4.4 introduced
10595-645: The Amazon Appstore , GetJar , and SlideMe. F-Droid , another alternative marketplace, seeks to only provide applications that are distributed under free and open source licenses . In October 2020, Google removed several Android applications from Play Store , as they were identified breaching its data collection rules. The firm was informed by International Digital Accountability Council (IDAC) that apps for children like Number Coloring , Princess Salon and Cats & Cosplay , with collective downloads of 20 million, were violating Google's policies. At
10758-495: The Android software development kit (SDK) and, often, Kotlin programming language, which replaced Java as Google's preferred language for Android app development in May 2019, and was originally announced in May 2017. Java is still supported (originally the only option for user-space programs, and is often mixed with Kotlin), as is C++ . Java or other JVM languages, such as Kotlin, may be combined with C /C++, together with
10921-555: The COVID-19 pandemic , many schools across the world were forced to close, which left more and more grade-school students participating in online learning, and university-level students enrolling in online courses to enforce distance learning. Organizations such as Unesco have enlisted educational technology solutions to help schools facilitate distance education . The pandemic's extended lockdowns and focus on distance learning has attracted record-breaking amounts of venture capital to
11084-477: The Duolingo English Test , an online language assessment , and Duolingo ABC, a literacy app designed for children. The company follows a freemium model, with optional premium services like Super Duolingo and Duolingo Max, which are ad-free and provide additional features. Additionally, Duolingo runs Duo's Taqueria , a Mexican taco restaurant. With over 100 million monthly active users, Duolingo
11247-827: The New Jersey Institute of Technology as well as developments at the University of Guelph in Canada. In the UK, the Council for Educational Technology supported the use of educational technology, in particular administering the government's National Development Programme in Computer Aided Learning (1973–1977) and the Microelectronics Education Programme (1980–1986). By the mid-1980s, accessing course content became possible at many college libraries. In computer-based training (CBT) or computer-based learning (CBL),
11410-513: The New Jersey Institute of Technology 's Electronic Information Exchange System (EIES) to deliver a distance education program to business executives. Starting in 1985, Connected Education offered the first totally online master's degree in media studies, through The New School in New York City, also via the EIES computer conferencing system. Subsequent courses were offered in 1986 by
11573-527: The Open Handset Alliance , a consortium of technology companies including Google, device manufacturers such as HTC, Motorola and Samsung, wireless carriers such as Sprint and T-Mobile , and chipset makers such as Qualcomm and Texas Instruments , unveiled itself, with a goal to develop "the first truly open and comprehensive platform for mobile devices". Within a year, the Open Handset Alliance faced two other open source competitors,
11736-571: The Symbian Foundation and the LiMo Foundation , the latter also developing a Linux -based mobile operating system like Google. In September 2007, InformationWeek covered an Evalueserve study reporting that Google had filed several patent applications in the area of mobile telephony. On September 23, 2008, Android was introduced by Andy Rubin, Larry Page, Sergey Brin, Cole Brodman, Christopher Schlaeffer and Peter Chou at
11899-743: The Windows 11 announcement event in June 2021, Microsoft showcased the new Windows Subsystem for Android (WSA) to enable support for the Android Open Source Project (AOSP), but it has since been deprecated. It was meant to allow users running Android apps and games in Windows 11 on their Windows desktop. On March 5, 2024, Microsoft announced deprecation of WSA with support ending on March 5, 2025. The storage of Android devices can be expanded using secondary devices such as SD cards . Android recognizes two types of secondary storage: portable storage (which
12062-400: The digital distribution platform Google Play , and the associated Google Play Services development platform. Firebase Cloud Messaging is used for push notifications. While AOSP is free, the "Android" name and logo are trademarks of Google, which imposes standards to restrict the use of Android branding by "uncertified" devices outside their ecosystem. Over 70% of smartphones based on
12225-534: The source code is made available to the Android Open Source Project (AOSP), an open source initiative led by Google. The first source code release happened as part of the initial release in 2007. All releases are under the Apache License . The AOSP code can be found with minimal modifications on select devices, mainly the former Nexus and current Android One series of devices. However, most original equipment manufacturers (OEMs) customize
12388-615: The 1950s in educational institutional settings. Cuisenaire rods were devised in the 1920s and saw widespread use from the late 1950s. In the mid-1960s, Stanford University psychology professors, Patrick Suppes and Richard C. Atkinson , experimented with using computers to teach arithmetic and spelling via Teletypes to elementary school students in the Palo Alto Unified School District in California . Stanford's Education Program for Gifted Youth
12551-486: The 1990s, teachers embarked on the method of using emerging technologies to employ multi-object oriented sites, which are text-based online virtual reality systems, to create course websites along with simple sets of instructions for their students. By 1994, the first online high school had been founded. In 1997, Graziadei described criteria for evaluating products and developing technology-based courses that include being portable, replicable, scalable, affordable, and having
12714-515: The Android Open Source Project run Google's ecosystem (which is known simply as Android), some with vendor-customized user interfaces and software suites, such as TouchWiz and later One UI by Samsung and HTC Sense . Competing ecosystems and forks of AOSP include Fire OS developed by Amazon , ColorOS by Oppo , OriginOS by Vivo , MagicUI by Honor , and custom ROMs such as LineageOS , as well as Meta Horizon OS for VR headsets . Android's source code has been used to develop variants on
12877-536: The Android division to take on new projects at Google, and that Sundar Pichai would become the new Android lead. Pichai himself would eventually switch positions, becoming the new CEO of Google in August 2015 following the company's restructure into the Alphabet conglomerate, making Hiroshi Lockheimer the new head of Android. On Android 4.4 , KitKat , shared writing access to MicroSD memory cards has been locked for user-installed applications, to which only
13040-514: The Android version and manufacturer. Many early Android OS smartphones were equipped with a dedicated search button for quick access to a web search engine and individual apps' internal search feature. More recent devices typically allow the former through a long press or swipe away from the home button. The dedicated option key, also known as menu key, and its on-screen simulation, is no longer supported since Android version 10. Google recommends mobile application developers to locate menus within
13203-595: The Duocon 2022 event. Duolingo Math covers math topics through an interactive and gradual approach. It starts with basic arithmetic—addition, subtraction, multiplication, and division. The app also teaches fractions and decimals, focusing on comparing, converting, and calculating. Geometry lessons include understanding shapes, calculating area and volume. Measurement is another focus, with exercises on using and converting different units like length and time. Duolingo also allows its users to play math games. In March 2023, Duolingo
13366-547: The EU. Computer-mediated communication (CMC) is between learners and instructors, mediated by the computer. In contrast, CBT/CBL usually means individualized (self-study) learning, while CMC involves educator/tutor facilitation and requires the scalarization of flexible learning activities. In addition, modern ICT provides education with tools for sustaining learning communities and associated knowledge management tasks. Students growing up in this digital age have extensive exposure to
13529-481: The EdTech industries as all the privately owned companies currently involved in the financing, production and distribution of commercial hardware, software, cultural goods, services and platforms for the educational market with the goal of turning a profit. Many of these companies are US-based and rapidly expanding into educational markets across North America, and increasingly growing all over the world." In addition to
13692-712: The Electronic University Network for DOS and Commodore 64 computers. In 2002, MIT began providing online classes free of charge. As of 2009 , approximately 5.5 million students were taking at least one class online. Currently, one out of three college students takes at least one online course while in college. At DeVry University , out of all students that are earning a bachelor's degree, 80% earn two-thirds of their requirements online. Also, in 2014, 2.85 million students out of 5.8 million students that took courses online, took all of their courses online. From this information, it can be concluded that
13855-638: The Nexus series, with a new generation of Pixel phones launched in October 2017. In May 2019, the operating system became entangled in the trade war between China and the United States involving Huawei , which, like many other tech firms, had become dependent on access to the Android platform. In the summer of 2019, Huawei announced it would create an alternative operating system to Android known as Harmony OS , and has filed for intellectual property rights across major global markets. Under such sanctions Huawei has long-term plans to replace Android in 2022 with
14018-496: The SAF to access any other part of the filesystem. Since Android devices are usually battery-powered, Android is designed to manage processes to keep power consumption at a minimum. When an application is not in use the system suspends its operation so that, while available for immediate use rather than closed, it does not use battery power or CPU resources. Android manages the applications stored in memory automatically: when memory
14181-489: The Storage Access Framework (SAF), a set of APIs for accessing files on the device's filesystem. As of Android 11, Android has required apps to conform to a data privacy policy known as scoped storage , under which apps may only automatically have access to certain directories (such as those for pictures, music, and video), and app-specific directories they have created themselves. Apps are required to use
14344-477: The United States and Canada in 2008–2009. Disadvantages of this form of educational technology are readily apparent: image and sound quality are often grainy or pixelated; videoconferencing requires setting up a type of mini-television studio within the museum for broadcast; space becomes an issue; and specialized equipment is required for both the provider and the participant. The Open University in Britain and
14507-533: The University of British Columbia (where Web CT, now incorporated into Blackboard Inc., was first developed) began a revolution of using the Internet to deliver learning, making heavy use of web-based training, online distance learning, and online discussion between students. Practitioners such as Harasim (1995) put heavy emphasis on the use of learning networks. With the advent of the World Wide Web in
14670-500: The University of Central Florida in 2011 used Tweets posted relating to emergencies like Hurricane Irene as data points, in order to teach their students how to code data. Social media technologies also allow instructors the ability to show students how professional networks facilitate work on a technical level. This is an instructional strategy where the majority of the initial learning occurs first at home using technology. Then, students will engage with higher-order learning tasks in
14833-453: The ability to adjust the flashlight brightness. Notifications are "short, timely, and relevant information about your app when it's not in use", and when tapped, users are directed to a screen inside the app relating to the notification. Beginning with Android 4.1 "Jelly Bean" , "expandable notifications" allow the user to tap an icon on the notification in order for it to expand and display more information and possible app actions right from
14996-591: The acquisition of vocabulary and concluded that it was "well suited" for beginners in this regard. According to Duolingo's own 2021 study, five sections of the app are roughly equivalent to five semesters of university instruction, and Duolingo is an "effective tool [...] at an intermediate level". A 2023 study funded by Duolingo concluded that Duolingo English learners did not significantly learn much grammar. Duolingo English learners in Colombia and Spain were found to gain significantly more proficiency than students in
15159-448: The best ways to learn something is to teach it to others. Social networks have been used to foster online learning communities around subjects as diverse as test preparation and language education . Mobile-assisted language learning (MALL) is the use of handheld computers or cell phones to assist in language learning. Collaborative apps allow students and teachers to interact while studying. Apps are designed after games, which provide
15322-434: The classroom with the teacher. Often, online tools are used for the individual at-home learning, such as: educational videos, learning management systems, interactive tools, and other web-based resources. Some advantages of flipped learning include improved learning performance, enhanced student satisfaction and engagement, flexibility in learning, and increased interaction opportunities between students and instructors. On
15485-483: The company in July of that year for at least $ 50 million; this was Google's "best deal ever" according to Google's then-vice president of corporate development, David Lawee , in 2010. Android's key employees, including Rubin, Miner, Sears, and White, joined Google as part of the acquisition. Not much was known about the secretive Android Inc. at the time, with the company having provided few details other than that it
15648-517: The company were to develop an advanced operating system for digital cameras , and this was the basis of its pitch to investors in April 2004. The company then decided that the market for cameras was not large enough for its goals, and five months later it had diverted its efforts and was pitching Android as a handset operating system that would rival Symbian and Microsoft Windows Mobile . Rubin had difficulty attracting investors early on, and Android
15811-410: The company's partnership with the developers of the video game Angry Birds 2 , a skit depicting Duo and the red Angry Bird attacking a crowd was uploaded. In November 2019, Saturday Night Live parodied Duolingo in a sketch where adults learned to communicate with children by using a fictitious course called "Duolingo for Talking to Children". The 2023 film Barbie contains a running gag where
15974-555: The cost of the application is added to the user's monthly bill. As of May 2017 , there are over one billion active users a month for Gmail, Android, Chrome, Google Play and Maps. Due to the open nature of Android, a number of third-party application marketplaces also exist for Android, either to provide a substitute for devices that are not allowed to ship with Google Play Store, provide applications that cannot be offered on Google Play Store due to policy violations, or for other reasons. Examples of these third-party stores have included
16137-458: The course. Most of Duolingo's language learning features are free, with periodic advertising in its mobile and web browser applications, which users can remove by paying a subscription fee or promoting referral links. This program, known as Super Duolingo, includes benefits such as unlimited hearts (retries), personalized practice, no ads, focused listening and speaking exercises, free and unlimited entries to legendary challenges and side quests, and
16300-675: The daily notification that will be sent out to the user. Duolingo provides a competitive space, such as in Leagues, where people can compete with randomly selected worldwide player groupings of up to 30 users. Users can also create their own avatars and compete against each other in Duolingo Clash. Rankings in leagues are determined by the number of "XP" ( experience points ) earned in a week. Badges in Duolingo represent achievements earned from completing specific objectives. Duolingo has
16463-575: The day". Any lesson completed in Duolingo will count towards the user's daily streak . The daily streak 's visual symbol in the app is fire. Duolingo's "Friend Streak" lets users maintain streaks with up to five friends. Duolingo operates on a freemium business model, offering free access to its learning platforms with ads. Revenue is primarily generated through subscriptions, which remove ads, and provide other perks like unlimited hearts and generative AI. The app also generates income from in-app purchases of virtual currency (Gems) and power-ups that enhance
16626-511: The dedicated directories with respective package names, located inside Android/data/ , remained writeable. Writing access has been reinstated with Android 5 Lollipop through the backwards-incompatible Google Storage Access Framework interface . In June 2014, Google announced Android One , a set of "hardware reference models" that would "allow [device makers] to easily create high-quality phones at low costs", designed for consumers in developing countries. In September, Google announced
16789-567: The display, show an overlay with the current status of the touch screen, show touching spots for possible use in screencasting , notify the user of unresponsive background processes with the option to end them ("Show all ANRs", i.e. "App's Not Responding"), prevent a Bluetooth audio client from controlling the system volume ("Disable absolute volume"), and adjust the duration of transition animations or deactivate them completely to speed up navigation. Developer options are initially hidden since Android 4.2 "Jelly Bean", but can be enabled by actuating
16952-552: The ed-tech sector. In 2020, in the United States alone, ed-tech startups raised $ 1.78 billion in venture capital spanning 265 deals, compared to $ 1.32 billion in 2019. Various pedagogical perspectives or learning theories may be considered in designing and interacting with educational technology. E-learning theory examines these approaches. These theoretical perspectives are grouped into three main theoretical schools or philosophical frameworks: behaviorism , cognitivism , and constructivism . This theoretical framework
17115-471: The exceptions of Duo, who is an owl , and Falstaff, who is a bear . Due to the app's frequent reminder notifications, Duolingo's mascot, a green cartoon owl named Duo, has been the subject of Internet memes antagonising him, with the character often depicted stalking or threatening users if they do not continue using the app. Duolingo has leaned into its online reputation and has adjusted its social media and marketing strategies accordingly. Acknowledging
17278-603: The expense of learners of a language with limited resources on the market and the potential halting of the Welsh Government 's "Cymraeg 2050" strategy to promote Welsh language learning. In 2013, Apple chose Duolingo as its iPhone App of the Year, a first for an educational application. That year, Duolingo ranked No. 7 on Fast Company 's "The World's Most Innovative Companies: Education Honorees" list "for crowdsourcing web translation by turning it into
17441-554: The extent to which technology is used. For example, "hybrid learning" or " blended learning " may refer to classroom aids and laptops, or may refer to approaches in which traditional classroom time is reduced but not eliminated, and is replaced with some online learning. "Distributed learning" may describe either the e-learning component of a hybrid approach, or fully online distance learning environments. E-learning may either be synchronous or asynchronous . Synchronous learning occurs in real-time, with all participants interacting at
17604-417: The field of computer science. Another major influence on the field of cognitive science is Noam Chomsky . Today researchers are concentrating on topics like cognitive load , information processing , and media psychology . These theoretical perspectives influence instructional design . There are two separate schools of cognitivism, and these are the cognitivist and social cognitivist. The former focuses on
17767-582: The first set of Android One phones for release in India. However, Recode reported in June 2015 that the project was "a disappointment", citing "reluctant consumers and manufacturing partners" and "misfires from the search company that has never quite cracked hardware". Plans to relaunch Android One surfaced in August 2015, with Africa announced as the next location for the program a week later. A report from The Information in January 2017 stated that Google
17930-454: The form of certificates. CBTs provide learning stimulus beyond traditional learning methodology from textbook, manual, or classroom-based instruction. CBTs can be a good alternative to printed learning materials since rich media, including videos or animations, can be embedded to enhance learning. However, CBTs pose some learning challenges. Typically, the creation of effective CBTs requires enormous resources. The software for developing CBTs
18093-648: The funds to develop new products and further expand its team in sectors like engineering, business development, design, curriculum and content creators, community outreach, and marketing. In October 2013, Duolingo launched a crowdsourced language incubator. In March 2021, it announced that it would be ending its volunteer contributor program and donating money to its volunteer contributors who helped develop it. The company said that from now on, language courses would be maintained and developed by professional linguists aligning with CEFR standards . On June 28, 2021, Duolingo filed for an initial public offering on NASDAQ under
18256-608: The husband of disgruntled Mattel employee Gloria uses Duolingo to learn Spanish, Gloria's native language. Duocon is Duolingo's annual conference, launched in 2019, aimed at gathering Duolingo users, language enthusiasts, and educational technology professionals. The conference serves as a platform to share the latest updates, features, and future plans of the app, while also exploring broader topics related to language learning and technology. The inaugural Duocon in 2019 featured presentations from Duolingo's team, interactive sessions, and announcements about new developments. The 2020 event
18419-544: The instructor is the principal source of knowledge and skills. The neologism "e-learning 1.0" refers to direct instruction used in early computer-based learning and training systems (CBL). In contrast to that linear delivery of content, often directly from the instructor's material, CSCL uses social software such as blogs , social media, wikis , podcasts , cloud-based document portals, discussion groups and virtual worlds. This phenomenon has been referred to as Long Tail Learning. Advocates of social learning claim that one of
18582-443: The intellectual and technical development of educational technology: Educational technology is an inclusive term for both the material tools and processes, and the theoretical foundations for supporting learning and teaching . Educational technology is not restricted to advanced technology but is anything that enhances classroom learning in the utilization of blended, face-to-face, or online learning . An educational technologist
18745-437: The issue. Android's default user interface is mainly based on direct manipulation , using touch inputs that loosely correspond to real-world actions, like swiping, tapping, pinching, and reverse pinching to manipulate on-screen objects, along with a virtual keyboard . Game controllers and full-size physical keyboards are supported via Bluetooth or USB . The response to user input is designed to be immediate and provides
18908-479: The journal Foreign Language Annals , found that participants who completed a course had similar reading and listening proficiency to university students after four semesters of study, concluding that Duolingo could be an effective tool for language learning. Another 2022 study of Malaysian students learning French, published by the National University of Malaysia Press, found that the app facilitated
19071-612: The learning experience. Another key revenue stream is the Duolingo English Test (DET), a low-cost English proficiency test. In April 2020, it passed one million paid subscribers; it reached 2.9 million in March 2022, and 4.8 million at the end of March 2023. As of June 2024 Duolingo has 8 million paying subscribers. Duolingo had revenue of $ 531 million in 2023, compared to $ 250.77 million in 2021, $ 36 million in 2018, $ 13 million in 2017, and $ 1 million in 2016. In May 2022, it
19234-444: The learning interaction was between the student and computer drills or micro-world simulations. Digitized communication and networking in education started in the mid-1980s. Educational institutions began to take advantage of the new medium by offering distance learning courses using computer networking for information. Early e-learning systems, based on computer-based learning/training often replicated autocratic teaching styles whereby
19397-559: The look and features of their Android devices to differentiate themselves from their competitors. Along the top of the screen is a status bar, showing information about the device and its connectivity. This status bar can be pulled (swiped) down from to reveal a notification screen where apps display important information or updates, as well as quick access to system controls and toggles such as display brightness, connectivity settings ( WiFi , Bluetooth, cellular data), audio mode, and flashlight . Vendors may implement extended settings such as
19560-438: The meme, Duolingo released a video on April Fools' Day 2019, depicting a facetious new feature called "Duolingo Push". In the video, users of "Duolingo Push" are reminded to use the app by Duo himself (depicted by a person wearing a Duolingo mascot costume ), who stares at and follows them until they comply. It was also acknowledged during Duolingo's 2022 April Fools' Day video, "Lawyer Fights Duolingo Owl for $ 2,700,000", where
19723-486: The mobile communications market continued to build through December 2006. An early prototype had a close resemblance to a BlackBerry phone, with no touchscreen and a physical QWERTY keyboard , but the arrival of 2007's Apple iPhone meant that Android "had to go back to the drawing board". Google later changed its Android specification documents to state that "Touchscreens will be supported", although "the Product
19886-607: The most common screen. Android supports all versions of OpenGL ES and Vulkan (and version 1.1 available for some devices ). Android devices incorporate many optional hardware components, including still or video cameras, GPS , orientation sensors , dedicated gaming controls, accelerometers, gyroscopes, barometers, magnetometers , proximity sensors, pressure sensors , thermometers, and touchscreens . Some hardware components are not required, but became standard in certain classes of devices, such as smartphones, and additional requirements apply if they are present. Some other hardware
20049-483: The most used operating system worldwide on smartphones since 2011 and on tablets since 2013. As of May 2021 , it has over three billion monthly active users , the largest installed base of any operating system in the world, and, as of 2024 , the Google Play Store features 1.7 million apps; a decline from its of peak of over 3 million apps in April 2021. Android 15 , released on October 15, 2024,
20212-513: The new operating system, as Harmony OS was originally designed for internet of things devices, rather than for smartphones and tablets. On August 22, 2019, it was announced that Android "Q" would officially be branded as Android 10, ending the historic practice of naming major versions after desserts. Google stated that these names were not "inclusive" to international users (due either to the aforementioned foods not being internationally known, or being difficult to pronounce in some languages). On
20375-409: The notification. An "All Apps" screen lists all installed applications, with the ability for users to drag an app from the list onto the home screen. The app list may be accessed using a gesture or a button, depending on the Android version. A "Recents" screen, also known as "Overview", lets users switch between recently used apps. The recent list may appear side-by-side or overlapping, depending on
20538-466: The number of students taking classes online is on a steady increase. The recent article, "Shift Happens: Online Education as a New Paradigm in Learning", Linda Harasim covers an overview of the history of online education as well as a framework for understanding the type of need it addresses. The concept of distance learning has already been invented for many centuries. The value of online education
20701-550: The official support. Since 2012, Android devices with Intel processors began to appear, including phones and tablets. While gaining support for 64-bit platforms, Android was first made to run on 64-bit x86 and then on ARM64 . An unofficial experimental port of the operating system to the RISC-V architecture was released in 2021. Requirements for the minimum amount of RAM for devices running Android 7.1 range from in practice 2 GB for best hardware, down to 1 GB for
20864-530: The operating system's build number in the device information seven times. Hiding developers options again requires deleting user data for the "Settings" app, possibly resetting some other preferences. The main hardware platform for Android is ARM (the ARMv7 and ARMv8-A architectures), with x86 and x86-64 architectures also officially supported in later versions of Android. The unofficial Android-x86 project provided support for x86 architectures ahead of
21027-497: The other hand, the disadvantages of flipped learning involve challenges related to student motivation, internet accessibility, quality of videos, and increased workload for teachers. Android (operating system) Android is a mobile operating system based on a modified version of the Linux kernel and other open-source software, designed primarily for touchscreen -based mobile devices such as smartphones and tablets . It
21190-468: The particular "narrowly defined" terminological aspect that was initially emphasized by name has blended into the general field of educational technology. Initially, "virtual learning" as narrowly defined in a semantic sense implied entering an environmental simulation within a virtual world , for example in treating posttraumatic stress disorder (PTSD). In practice, a "virtual education course" refers to any instructional course in which all, or at least
21353-507: The planned Duolingo Max, a subscription tier above Super Duolingo, in their blog. In July 2023, Duolingo launched a feature using the iOS widget feature. In October 2023, Duolingo released math and music courses in English and Spanish for iOS users. In 2024, Duolingo made several changes: it replaced some contractor tasks with AI in January, launched the widget feature on Android in March, acquired Detroit-based design studio Hobbes, introduced Friend Streak in August, allowing students to share
21516-1035: The practical educational experience, educational technology is based on theoretical knowledge from various disciplines such as communication, education, psychology, sociology, artificial intelligence, and computer science. It encompasses several domains including learning theory , computer-based training, online learning, and m-learning where mobile technologies are used. The Association for Educational Communications and Technology (AECT) has defined educational technology as "the study and ethical practice of facilitating learning and improving performance by creating, using and managing appropriate technological processes and resources". It denotes instructional technology as "the theory and practice of design , development, utilization, management, and evaluation of processes and resources for learning". As such, educational technology refers to all valid and reliable applied education sciences, such as equipment, as well as processes and procedures that are derived from scientific research , and in
21679-508: The professional educational level, training may include virtual operating rooms . Asynchronous learning is beneficial for students who have health problems or who have childcare responsibilities. They have the opportunity to complete their work in a low-stress environment and within a more flexible time frame. In asynchronous online courses, students are allowed the freedom to complete work at their own pace. Being non-traditional students, they can manage their daily life and school and still have
21842-486: The role of the e-learning system was assumed to be for transferring knowledge, as opposed to systems developed later based on computer-supported collaborative learning (CSCL), which encouraged the shared development of knowledge. Videoconferencing was an important forerunner to the educational technologies known today. This work was especially popular with museum education . Even in recent years, videoconferencing has risen in popularity to reach over 20,000 students across
22005-527: The same day, Android Police reported that Google had commissioned a statue of a giant number "10" to be installed in the lobby of the developers' new office. Android 10 was released on September 3, 2019, to Google Pixel phones first. In late 2021, some users reported that they were unable to dial emergency services. The problem was caused by a combination of bugs in Android and in the Microsoft Teams app; both companies released updates addressing
22168-503: The same time. In contrast, asynchronous learning is self-paced and allows participants to engage in the exchange of ideas or information without the dependency on other participants' involvement at the same time. Synchronous learning refers to exchanging ideas and information with one or more participants during the same period. Examples are face-to-face discussion, online real-time live teacher instruction and feedback, Skype conversations, and chat rooms or virtual classrooms where everyone
22331-419: The screen, allowing the user to quickly assess the charge status of a powered-off without having to boot it up first. Some display the battery percentage. Most Android devices come with preinstalled Google apps including Gmail, Google Maps, Google Chrome, YouTube, Google Play Movies & TV, and others. Applications (" apps "), which extend the functionality of devices (and must be 64-bit ), are written using
22494-477: The sensory input is transformed, reduced, elaborated, stored, recovered, and used" by the human mind. The Atkinson-Shiffrin memory model and Baddeley's working memory model were established as theoretical frameworks. Computer science and information technology have had a major influence on cognitive science theory. The cognitive concepts of working memory (formerly known as short-term memory) and long-term memory have been facilitated by research and technology from
22657-409: The social aspect. Asynchronous collaborations allow the student to reach out for help when needed and provide helpful guidance, depending on how long it takes them to complete the assignment. Many tools used for these courses are but are not limited to: videos, class discussions, and group projects. Through online courses, students can earn their diplomas faster, or repeat failed courses without being in
22820-470: The ticker DUOL. From August 2021 to June 2022, the Duolingo language learning app was removed from some app stores in China. In the early 2020s, Duolingo was noted for its viral videos on the social media platform TikTok . In August 2022, Duolingo overhauled its interface , changing its course structure from a tree-like design, where users could choose from a range of lessons after completing previous ones, to
22983-549: The understanding of the thinking or cognitive processes of an individual while the latter includes social processes as influences in learning besides cognition. These two schools, however, share the view that learning is more than a behavioral change but is rather a mental process used by the learner. Educational psychologists distinguish between several types of constructivism : individual (or psychological) constructivism, such as Piaget's theory of cognitive development , and social constructivism . This form of constructivism has
23146-495: The user interface. On more recent phones, its place is occupied by a task key used to access the list of recently used apps when actuated. Depending on device, its long press may simulate a menu button press or engage split screen view, the latter of which is the default behaviour since stock Android version 7. Native support for split screen view has been added in stock Android version 7.0 Nougat . The earliest vendor-customized Android-based smartphones known to have featured
23309-431: The view of teaching people how to do something with rewards and punishments, it is related to training people. B.F. Skinner wrote extensively on improvements in teaching based on his functional analysis of verbal behavior and wrote "The Technology of Teaching", an attempt to dispel the myths underlying contemporary education as well as promote his system he called programmed instruction . Ogden Lindsley developed
23472-576: The world" and wanted to provide an accessible means for doing so. He was recognized by the National Inventors Hall of Fame for his contributions to language learning and technological development. The Duo mascot is a green owl because co-founder Severin Hacker hates the color green. The project was originally financed by von Ahn's MacArthur fellowship and a National Science Foundation grant. The founders considered creating Duolingo as
23635-434: Was acquired by Google in 2014 that provides helpful tools for app and web developers. Android has a growing selection of third-party applications, which can be acquired by users by downloading and installing the application's APK (Android application package) file, or by downloading them using an application store program that allows users to install, update, and remove applications from their devices. Google Play Store
23798-719: Was adapted to a virtual format due to the COVID-19 pandemic . Subsequent events have also been held online. Duo's Taqueria is a taqueria (a Mexican taco restaurant) in Pittsburgh, Pennsylvania, operated by Duolingo. The taqueria offers a variety of authentic Mexican tacos and other traditional dishes. The restaurant encourages patrons to order in Spanish, aligning with Duolingo's mission of making language learning fun and accessible. Duolingo's taco shop brought in $ 700,000 in 2023. Educational technology Educational technology (commonly abbreviated as edutech , or edtech )
23961-512: Was among CNBC 's "Disruptor 50" lists for 2018 and 2019, and was ranked as one of TIME magazine 's 50 Genius Companies. Duolingo was named one of Forbes 's "Next Billion-Dollar Startups 2019". In 2023, Duolingo won a Design Award during the 2023 edition of the Apple Design Awards . Duolingo has brand characters that were used for engagement . The main characters include: All characters mentioned above are human, with
24124-465: Was announced that Duolingo raised $ 30 million in a Series F funding round from Alphabet 's investment company, CapitalG . The round valued Duolingo at $ 1.5 billion. Duolingo reported 30 million active users at this time. The headcount at the company had increased to around two hundred, and new offices had been opened in Seattle , New York , and Beijing . Duolingo planned to use
24287-498: Was described as having "played a pivotal role in Android's history by introducing new software iterations and hardware standards across the board", and became known for its " bloat-free " software with "timely ... updates". At its developer conference in May 2013, Google announced a special version of the Samsung Galaxy S4 , where, instead of using Samsung's own Android customization, the phone ran "stock Android" and
24450-472: Was designed with the presence of discrete physical buttons as an assumption, therefore a touchscreen cannot completely replace physical buttons". By 2008, both Nokia and BlackBerry announced touch-based smartphones to rival the iPhone 3G , and Android's focus eventually switched to just touchscreens. The first commercially available smartphone running Android was the HTC Dream , also known as T-Mobile G1, announced on September 23, 2008. On November 5, 2007,
24613-460: Was developed in the early 20th century based on animal learning experiments by Ivan Pavlov , Edward Thorndike , Edward C. Tolman , Clark L. Hull , and B.F. Skinner . Many psychologists used these results to develop theories of human learning, but modern educators generally see behaviorism as one aspect of a holistic synthesis. Teaching in behaviorism has been linked to training, emphasizing animal learning experiments. Since behaviorism consists of
24776-500: Was difficult to apply the thinking activity to non- LOGO -based activities. By the late 1980s, LOGO and other similar programming languages had lost their novelty and dominance and were gradually de-emphasized amid criticisms. The extent to which e-learning assists or replaces other learning and teaching approaches is variable, ranging on a continuum from none to fully online distance learning . A variety of descriptive terms have been employed (somewhat inconsistently) to categorize
24939-432: Was facing eviction from its office space. Steve Perlman , a close friend of Rubin, brought him $ 10,000 in cash in an envelope, and shortly thereafter wired an undisclosed amount as seed funding. Perlman refused a stake in the company, and has stated "I did it because I believed in the thing, and I wanted to help Andy." In 2005, Rubin tried to negotiate deals with Samsung and HTC . Shortly afterwards, Google acquired
25102-530: Was formulated in 2009 by Carnegie Mellon University professor Luis von Ahn and his Swiss-born post-graduate student Severin Hacker . Von Ahn had sold his second company, reCAPTCHA , to Google and, with Hacker, wanted to work on an education-related project. Von Ahn stated that he saw how expensive it was for people in his community in Guatemala to learn English. Hacker (co-founder and current CTO of Duolingo) believed that "free education will really change
25265-586: Was initially required, but those requirements have been relaxed or eliminated altogether. For example, as Android was developed initially as a phone OS, hardware such as microphones were required, while over time the phone function became optional. Android used to require an autofocus camera, which was relaxed to a fixed-focus camera if present at all, since the camera was dropped as a requirement entirely when Android started to be used on set-top boxes . In addition to running on smartphones and tablets, several vendors run Android natively on regular PC hardware with
25428-466: Was making software for mobile phones. At Google, the team led by Rubin developed a mobile device platform powered by the Linux kernel . Google marketed the platform to handset makers and carriers on the promise of providing a flexible, upgradeable system. Google had "lined up a series of hardware components and software partners and signaled to carriers that it was open to various degrees of cooperation". Speculation about Google's intention to enter
25591-648: Was promised to receive new system updates fast. The device would become the start of the Google Play edition program, and was followed by other devices, including the HTC One Google Play edition, and Moto G Google Play edition. In 2015, Ars Technica wrote that "Earlier this week, the last of the Google Play edition Android phones in Google's online storefront were listed as "no longer available for sale" and that "Now they're all gone, and it looks
25754-450: Was rapidly introduced throughout the globe. Many institutions adopted this similar technique while the internet was in its developmental phase. In 1971, Ivan Illich published a hugely influential book, Deschooling Society , in which he envisioned "learning webs" as a model for people to network the learning they needed. The 1970s and 1980s saw notable contributions in computer-based learning by Murray Turoff and Starr Roxanne Hiltz at
25917-514: Was rated the No. 1 free education app in the Google Play Store . In February 2014, Duolingo announced that it had raised $ 20 million from a Series C funding round led by Kleiner Caufield & Byers , with prior investors also participating. At this time, it had 34 employees, and reported about 25 million registered users and 12.5 million active users; it later reported
26080-431: Was reported that 6.8% of its monthly active users paid for the ad-free version of the app. A 2017 study found no significant difference between elementary students learning Spanish through the "gamification" of the Duolingo app and those learning in classroom environments, with both groups demonstrating a similar increase in achievements and self-efficacy . Duolingo's occasional use of 'erratic' phrases—such as "The bride
26243-492: Was reportedly developing a new music course that would allow users to learn how to read and play music through its gamified learning experience. On October 11, 2023, Duolingo formally unveiled Duolingo Music in a YouTube Short , a new platform within the existing app that provides basic music learning through piano and sheet music lessons. As of April 2024, it is currently available on iOS and Android devices. Since August 2024, users can practice music by playing pop songs in
26406-551: Was sold in a hacker forum. Duolingo later stated that they would investigate the "dark web post". They concluded that the data was obtained by scraping publicly available information based on an exposed application programming interface (API). Duolingo's spokesperson states that the API is intentionally publicly visible. Since the end of October 2023, Duolingo has stopped updating its Welsh course to "focus on languages in higher demand". Some users criticized this decision because it came at
26569-494: Was the Army Alpha , used to assess the intelligence and, more specifically, the aptitudes of World War I military recruits. Further large-scale use of technologies was employed in training soldiers during and after WWII using films and other mediated materials, such as overhead projectors . The concept of hypertext is traced to the description of memex by Vannevar Bush in 1945. Slide projectors were widely used during
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