Learn Stuff For Free

Here's a pretty comprehensive list of colleges and universities (mostly in the US) which offer course content for free online, such as videos or podcasts of lectures, course notes, exercises, and sample exams. I've never done a full course this way but I've looked at a fair bit of MIT's Biology content out of interest and it was pretty good, both in content quality and production quality. More here than you could ever hope to learn, but it's all for the great price of nine ninety-free, so there's nothing to lose! (Hint hint: uni I am going to be in debt to: you'd better be awesome!)