Third graders have been exploring our state via old maps from the Department of Transportation. The first lesson is about how to unfold and and fold a map! They understand conceptually what mountain and valley folds, but when it comes time to actually do the unfolding and folding, things do not seem to go smoothly. One usually quiet girl finished and proudly flipped her perfectly folded map into my hands and said, "Piece of cake!" Another told me in a whisper after others had departed, "I'm really glad you showed us how to do it!"