For the past ten years, we’ve been busy rummaging around the internet and adding courses to an ever-growing list of Free Online Courses, which now features 1,200+ courses from top universities. Let’s give you the quick overview: The list lets you download audio & video lectures from schools like Stanford, Yale, MIT, Oxford and Harvard. Generally, the courses can be accessed via YouTube, iTunes or university web sites, and you can listen to the lectures anytime, anywhere, on your computer or smart phone. We haven’t done a precise calculation, but there are about 40,000 hours of free audio & video lectures here. Enough to keep you busy for a very long time.