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Khan Academy  
    Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan to provide "a free, world-class education for anyone, anywhere". The organization produces micro lectures in the form of YouTube videos. In addition to micro lectures, the organization's website features practice exercises and tools for educators. All resources are available for free to anyone around the world.
 
 
 
Khan Academy
 
 
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An edited selection from WikiPedia:

History: The founder of the organization, Salman Khan, grew up in New Orleans, Louisiana, United States to a father from Barisal, Bangladesh, and mother from Calcutta, India. After earning three degrees from the Massachusetts Institute of Technology (a BS in mathematics, a M.Sc. in electrical engineering and computer science, and an MEng in electrical engineering and computer science) he pursued an MBA from Harvard Business School.

In late 2004, Khan began tutoring his cousin Nadia who needed help with math using Yahoo!'s Doodle notepad. When other relatives and friends sought similar help, he decided it would be more practical to distribute the tutorials on YouTube. Their popularity there and the testimonials of appreciative students prompted Khan to quit his job in finance as a hedge fund analyst at Connective Capital Management in 2009, and focus on the tutorials (then released under the moniker "Khan Academy") full-time.

The project is funded by donations. Khan Academy is a 501(c)(3) not-for-profit organization, now with significant backing from the Bill & Melinda Gates Foundation, Ann and John Doerr, the Brazil-based Lemann Foundation, and Google. In 2010, Google announced it would give Khan Academy $2 million for creating more courses and for translating the core library into the world’s most widely spoken languages, as part of their Project 10100. In 2012, Google's first employee, Craig Silverstein, left there and joined Khan Academy. In 2013, the Mexico-based Carlos Slim Foundation made a donation to Khan Academy to expand its Spanish library of videos. In 2015, to enable anytime, anywhere learning for people across the world, AT&T contributed $2.25 million to Khan Academy to fund development of a new mobile learning platform and app.

In the beginning, Khan Academy offered videos mostly about mathematics. Thanks to donations, Khan Academy has been able to expand its faculty and offer courses about history, healthcare, medicine, finance, physics, chemistry, biology, astronomy, cosmology, American civics, art history, economics, music, computer programming and computer science. In addition to faculty, the organization has a network of content specialists.

Khan Academy also has thousands of resources translated into other languages. It launched the Spanish version of the website in September 2013 followed by the Brazilian Portuguese, French and Turkish versions. It is supported by partners and volunteers in languages including Indonesian, German, Spanish, Czech, French, Italian, Swahili, Norwegian, Polish, Portuguese, Russian, Turkish, Xhosa, Greek, Bulgarian, Ukrainian, Urdu, Arabic, Persian, Bengali, Hindi, Malayalam, and Chinese. Khan Academy's website has been translated to 23 languages and its videos to 65.

All videos (hosted via YouTube) are available through Khan Academy's own website (khanacademy.org), which also contains many other features such as progress tracking, practice exercises, and a variety of tools for teachers in public schools. Logging into the site can be done via a Google or a Facebook account for those who do not want to create a separate Khan Academy account. The material can also be accessed through Khan Academy's own mobile applications, which can be found free of charge in App Store and Windows Store.

The videos show step-by-step doodles and diagrams on an electronic blackboard. Not-for-profit groups have distributed offline versions of the videos to rural areas in Asia, Latin America, and Africa.

Khan Academy also provides an adaptive web-based exercise system that generates problems for students based on skill and performance. Khan believes his academy presents an opportunity to overhaul the traditional classroom by using software to create tests, grade assignments, highlight the challenges of certain students, and encourage those doing well to help struggling classmates. The tutorials are touted as helpful because, among other factors, they can be paused by students while classroom lectures can not.

Methodology:Khan Academy has been criticized because Salman Khan does not have a background in pedagogy. Statements made in some videos have also been questioned. In response to these criticisms, the organization has fixed errors in its videos, expanded its faculty and built a network of content specialists.

Services and vision:The major components of Khan Academy include: a personalized learning engine to help people track what they have learned and recommend what they can do next. A video library with over 6500 videos in various topic areas. These videos are licensed under a Creative Commons,automated exercises with continuous assessment. The exercise software is available as open source under the MIT license.

Recognition:Khan Academy has gained recognition both nationally and internationally: Bill Gates spoke about Khan Academy at the Aspen Ideas festival. In 2010, Google's Project 10100 provided $2 million to support the creation of more courses, to allow for translation of the Khan Academy's content, and to allow for the hiring of additional staff.
In November 2011, the Khan Academy received a $5 million grant from the Ireland-based O'Sullivan Foundation. In April 2012, the founder and executive director of Khan Academy, Salman Khan, was listed among the Time 100 Most Influential People for 2012. In 2013, the Mexico-based Carlos Slim Foundation made a donation to Khan Academy to expand its Spanish library of videos.
Khan was one of five winners of the 2014 Heinz Award. His award was in the area of "Human Condition."
In July 2014, the U.S. Department of Education launched a $3 million randomized-control trial to gauge the effectiveness of Khan Academy. The trial will focus on mathematics and will take place during the 2015–2016 school year.