Open Culture

Aggregate list of free online college courses from universities

http://www.openculture.com/freeonlinecourses

Get free online courses from the world’s leading universities. This collection includes over 400 free courses in the liberal arts and sciences. Download these audio & video courses straight to your computer or mp3 player.

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Khan Academy

Educational video lessons – Math, Science, Humanities

http://www.khanacademy.org/

With a library of over 3,000 videos covering everything from arithmetic to physics, finance, and history and 315 practice exerciseswe’re on a mission to help you learn what you want, when you want, at your own pace.