Tonight (check your local listings), PBS will run a documentary called "Seeing in the Dark", about amateur astronomers and their contribution to the science. It's based on a book of the same name by Timothy Ferris, a writer and astronomer who used to live down the road from me a little ways before I moved to Boulder. ;-)
I have not read the book (I can't keep up!) but I have heard the book and the show are quite good. The PBS site has an extensive series of pages supporting the show, and any educators who read this blog should check iot out; I'm sure there is plenty there that will be useful in the classroom!