I don't know much about this so my comments are speculative but I'm wondering if the lack of percentile on the summer test has something to to do with how they were normed. NWEA has very strict testing windows so they can compare all the kids nationally during a snapshot in time. Is it possible they didn't have enough data in this year's summer sample for that age group?
Another question is whether your child took the survey with goals on both tests or is it possible he took the survey in he first sitting and the survey with goals in the second sitting? Could that explain the difference in the scores?
