I know we are all familiar with dot-gov sites like American Memory and Ben's Guide to U.S. Government for Kids. As per usual, I was looking around for something totally different and came upon a nice site that brings many of these dot-gov resources together in one place.
Here is sample list of some of the topics covering a variety of subjects...science, health, geography, math, and on and on!
Oh, btw... FREE, yes indeed. F - R - E - E as in Federal Resources for Educational Excellence. Despite the many woes that are often discussed at length in the blog world, OUR government is on our side with these resources. You must admit that!