Thanks so much for the advice, link to RIT scale norms and the terrific article. This clarifies a lot for me. My husband and I need to speak more in depth with his teacher and principal. It sounds like he might benefit from some subject/grade acceleration, if they're open to that at our school.

I think we're going to have to start some after-schooling too. Maybe I was incorrect to think he needed to play more than have some meaningful work!