"In recent months, we’ve enhanced what’s now a list of 875 Free Online Courses from top universities. Here’s the lowdown: Our big list of free courses lets you download audio & video lectures from schools like Stanford, Yale, MIT, Oxford, Harvard and UC Berkeley. Generally, the courses can be accessed via YouTube, iTunes or university web sites. Right now you’ll find 100 free philosophy courses, 67 free history courses, 90 free computer science courses, and 47 free Physics courses on the list, and that’s just beginning to scratch the surface. Indeed you can also find sections covering Astronomy, Biology, Business, Chemistry, Economics, Engineering, Literature, Math, Political Science, Psychology and Religion. If you want to ballpark it, there are about 27,000 hours of free audio & video lectures here. And if you spend 8 hours per day enriching yourself, you can keep yourself busy for the next 10 years. At no cost."