AIMSweb is a progress monitoring and screening tool designed primarily for identifying low performers. I could (and probably will!) say more, but honestly, that's about all you need to know. There is some consideration given to higher-performing students, but higher-performing is defined as >90th %ile.
Without commenting on actual norm-referenced scores (which we don't have), a couple of points stand out to me: it appears that his performance on MCAP was affected by the speed with which he was able to work, as his teacher describes him as slow but accurate. His MCOMP score is probably quite near the ceiling of the test, which means that using an out-of-level AIMSweb probe might be more informative with regard to progress monitoring (e.g., having a 3rd grader take the 4th grade set of probes).
Normative data in AIMSweb is generally interpreted on a local level, rather than nationally, as the intent is to facilitate a tiered system of supports for the student pool at hand, not in the abstract.
