I really feel your pain! This sounds so much like my DS7 (1st grade). He learns nothing at school, and really prefers to play at the end of the day. And complains about it. The social justice guy in him doesn't think this is right.
He has not had a full assessment but hit the ceiling scores on the NNAT. I have no idea what this would look like on a WISC or SB for him, but I do know he is miserable in the regular classroom even with a couple hours enrichment a week. And is working years ahead in reading and at least conceptually in math (he's just learning notation and showing work in math).
I think that is part of the reason we haven't forked over the bucks for the full assessment. We know he is not a fit in a regular classroom without some major accommodations. I think if you're gut is telling you he needs additional challenge or change, you should listen to it. It's one thing to complain once or twice a month. It's another to do it daily or almost daily. We are most likely homeschooling next year.
And I know lots of kids in my son's class who aren't thrilled with school on all ends of the spectrum. I hope their parents are looking out for them! Especially if they are also not learning anything.
