Khan Academy

Salman Khan left his job as a hedge fund analyst to devote himself to fulfilling his dream for a future in which anyone, anywhere in the world with access to the Internet can get a world-class, free education on the web. Khan started the Khan Academy, a not-for-profit organization with a mission to provide the world with free, high quality educational material. Khan has uploaded over 2,200 tutorials to YouTube so far, including math, physics, chemistry, finance and biology concepts.

READ ARTICLE: Salman Khan on Charlie Rose: Will Khan Academy Flip The Classroom Upside Down?