Stumbled on this site maintained by the Springfield Township Highschool while I was searching for some copyright free clip art.
It has links to a variety of different sources for images of all sorts. The links I checked all worked and I was able to find several that I'll be sending my students to check out.
It's worth bookmarking.
[Image:"Spinosaurus": WiseGorilla clip art: http://www.wisegorilla.com/images/dinosaurs/1-spinosaurus.GIF]
