Khan College (Khan Academy) is a famous non-profit educational institution. It provides free educational videos through the Internet. It was founded by Salman Khan in 2006. The teaching videos provided by Khan college cover many social and natural science subjects such as mathematics, medicine, history, finance, computer science, chemistry, physics, etc. the teaching languages include English, German, Spanish, Chinese, etc Dozens of languages. Some videos of Khan college have been translated on some open class websites in China.
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