Welcome. I agree with Grinity (although I wouldn't be too quick to wonder about ADHD in a 5yo who's inattentive when underchallenged in a group of 30!) but also, how about the real basic first step - ask for a meeting with the teacher at a time when she can pay you her full attention. Take in a couple of the books he's been reading for pleasure at home, and a few sheets of maths work he's done for fun. Tell her you're worried about his diminishing enjoyment of school and concerned about the behaviour issues, and see whether you can come up with a plan between you. She may never have met a child as far advanced as he is, and perhaps just isn't realising how far she is from meeting his needs. Perhaps, if you help her see it, she may be on your (his!) side...
