Canon Explains Exposure
Play Around with DSLR Settings
Are learning how to use a DSLR camera? Hate taking all the complex classes? Wish there was a better way to learn all the manual components of taking a picture? There is!
Cannon has a cool site called Canon Explains Exposure where you play around will all the various setting and see what happens.
You simply adjust the various settings and get a "live view" of the changes. It is a good way to learn how simple adjustments can change a photo.