Khan Academy

Khan Academy (Khan Academy) is a famous non-profit educational organization that provides free educational videos through the internet and was founded in 2006 by Salman Khan. Khan Academy provides educational videos on a wide range of social and natural science subjects such as math, medicine, history, finance, computer science, chemistry, physics, and more. Teaching languages include English, German, Spanish, Chinese, and dozens of other languages. Some of Khan Academy's videos are translated in some Chinese open course websites.