Little appreciated outside the world of academia, there are literally thousands of .edu sites bursting with incredibly useful and interesting information and resources. Most of these sites won't pop up to the surface of the average search engine quest, and so they wait, neglected and underused...until now.

In addition to all these rich resources, you can mine the web for much, MUCH more simply by using this search string in Google: site:.edu "insert subject here". Just tweak that as needed and you'll be able to find a ton more than I could ever have time to write here.