From its Website
A world-class education at your fingertips.
Academic Earth aims to provide everyone with the opportunity to earn a world-class education by offering free online classes and online learning tools. Whether you’re looking to advance your career or take classes that interest you, Academic Earth can connect you to the world’s top universities and scholars.
This is a repository of FREE university courses and lectures that have been made available online. (Did we say free yet?) If you’ve ever wondered what it would be like to sit in on a lecture at a prestigious university, this site offers a window into classrooms at UC Berkeley, Stanford, MIT, Carnegie Mellon, Yale, and more. The university level content is wide ranging such as business, mathematics, engineering, science, humanities, social sciences, art and design, and test preparation for ACT, SAT, GRE, and LSAT, etc.
The top ranked courses include an introduction to Computer Science and Programming, Introduction to Ancient Greek History and Physics II: Electricity and Magnetism. Academic Earth also offers “playlists” that take you to short-term lecture series on You Are What You Eat (3 lectures), The Nature of Evil (6 lectures), Love is in the Air (6 lectures) and Living a Good Life (3 lectures).