Free Education All Over the Net

There are lots of places that offer free courses online.  I decided to take advantage of MIT's online coursewear because it's such a well-respected school of science, and particularly of engineering.

Naturally, the books are not free.  But if you're interested in checking out their online courses, here's the link:    https://ocw.mit.edu/index.htm

If you've ever wanted to learn code, which I encourage everyone to learn:
https://www.khanacademy.org/computing/computer-programming

I will be adding to this post as I remember more sources.