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 — ...

Forbes contributors publish independent expert analyses and insights. I focus on philanthropy, civil society, housing and the welfare state. Just eight years after its founding, Khan Academy has ...

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 ...