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 — ...

Here’s how Salman Khan thinks schools should work: Students should learn lessons online and do homework and projects in class. This "flipping" of the traditional classroom is the operating system ...

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. ...