My child took the MAP and from one year to the next, dropped 6 points! It was wacky! She was still in the 99th percentile. The teacher said sometimes they just don't test well that day, or that particular set of questions was something they didn't know. In any case, we never really understood it, but the next year she jumped 12 points. I don't think the scores tell the whole story. I'm sure he's learned something! Most of the items that DD is tested on at her level no one has ever taught her anyway and we aren't even sure how she gets them right!