Salman Khan started as a hedge-fund manager upon teaching his 7th-grade cousin the basics of math via Yahoo Doodler, was inspired to create more “lectures” and post then on Youtube.

http://www.youtube.com/user/khanacademy

Thus has started a movement of going to “Khan Academy” and learn concepts that still stump students during homework.

Khan Academy is a non-profit and covers Math, Biology, Physics, History and Computer Science.

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