From a tiny closet in Mountain View, Sal Khan is educating the globe for free. His 1,516 videotaped mini-lectures — on topics ranging from simple addition to vector calculus and Napoleonic campaigns — ...
In 2008, Sal Khan had a bright future making millions as a hedge fund manager. He gave it up to produce low-budget math films on YouTube for free. Fortunately, hidden among his millions of loyal ...
Opinions expressed by Entrepreneur contributors are their own. This may surprise you, but Sal Khan used to skip classes at MIT. They were too long and boring, he often thought, particularly lectures. ...
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