From what I've seen of MAP some kids might have about the same score for an entire year (dropping or rising slightly every few months) and then take a big jump up. I don't think it's all that sensitive. One lucky or unlucky guess can change the score.
Would you be concerned if the percentile kept dropping over two school years of test periods, from 99th to 90th? Say, a reading RIT score that in FA15 on the 2-5 then went up a few points in SP16, then dropped 1 point below FA15 score when moved to the 6+ test. Up only 1 point in WI17 and stayed same SP17, resulting in 1 point growth for the whole year, but the same RIT score as FA15? The kid read over 120 books this year (made a list). The math score recovered from the 6+ switch, but had a bigger drop and then over 10 points growth this year, to 14 points higher than FA15. Both subjects were in the 99th percentile on the statewide grade level test. Ride it out, or ask someone about it? Lit teacher indicated it was difficult to keep him challenged in class.
