If you are in the 3rd grade, I guess May is diorama month.
But this got me thinking how many dioramas are needed until the hot glue gun and such are mastered. Because I don't think this medium is too educational beyond the craft-skills level.
How about teaching the kids to use Google SketchUp to make a virtual diorama ? Or iStopMotion to make a little educational movie set in a diorama ?