The Khan Academy is a not-for-profit educational organization providing, at last count, over 3,000 videos and 315 practice exercises on topics ranging from algebra to art history to biology to astronomy. The mission of the Khan Academy is ambitious: to provide a free world-class education to anyone anywhere. Judging from the response of our students, Khan is well on its way to realizing this goal.
In March 2011, Khan Academy founder Salman Khan gave a TED talk on the power of video to reinvent education; more recently, a 60 Minutes report speculated on whether the Khan Academy model is The Future of Education.