Khan Academy, a non-profit organization that provides free online education to anyone, anywhere in the word. Khan academy was started by Salman Khan (No Bollywood Connections), who quits his job to start online teaching. “Its our mission to accelerate learning for students of all ages.” – thats the slogan of Khan Academy. Khan teaches on an electronic blackboard with his voice in the background explaining all the concepts. He never appears in the videos. Initially he started teaching maths, now his lectures covers Physics, Chemistry, Finance, History, Computer Science and much more. Khan Academy also provides online exercises, to practice what a student has learned. You can login using Google or Facebook , and the website will track your progress. Its really a revolution in the field of education. In, 2010 Google announced that they will be giving Khan Academy $2 million to support creation of more courses and also to enable Khan Academy to translate their courses into most widely spoken languages.
Additional Reading: How Khan Academy Is Changing the Rules of Education (wired.com)



They use CC-by-NC-SA, right? That is a problematic license if you value the ability for people to create open business models (I don’t think I would contribute for that reason). It is a necessity of life to engage in commerce if you aren’t independently wealthy. This license is not “open source” friendly unless you want only volunteers to contribute.
On the other hand, khana might give you a special license for particular commercial use if you want to take your chances with that, and it is generally a good thing more people are trying to provide organized free visual lessons for society.
I want to mention stackoverflow. They provide a P2P download of the entire contents of the site and use CC-by-SA (last time I checked) which is sort of like a weaker version of the GPL.
I have been interested in a while for producing tutorials on lots of topics (including the source code to the tutorials/videos) and using open source licenses. Although I will eventually get going on this, I would be happy to know of similar efforts out there. I though I might want to leverage ka but won’t as long as they use that license.
>> This license is not “open source” friendly unless you want only volunteers to contribute.
I need to clarify this.
Anyone can contribute, but you can’t use the material within a commercial context (a very common scenario) under the NC license.
Amazing site… a true find! Thanks for the info!