pppst.com I found several free power point presentation links, links for student games and 6 great resources and links for teachers as well as free clip art. Just click on the picture above to check them out.
Another interactive game website can be found by clicking on the picture below. This has interactive games for all elementary grade levels.
HERE. I have a new free one which you can download by clicking on the picture below.
What science units do you teach?