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 — ...

Khan Academy is a site that hosts thousands of lectures in topics from physics to finance. They're divvied up into videos that are anywhere from 3 to 15 minutes long. It's a far cry from a typical ...

Salman Khan and his team have one mission: “to provide free, world-class education for anyone, anywhere.” And every day, Khan ...

Windows/Mac/Linux: Khan Academy is pretty useful for learning about computer science, math, and many other subjects. If you'd rather learn without being tied to an internet connection, KA Lite allows ...