I broadly agree with Iucounu. I think you're right to be stressing, purely because he is not happy there. (If he were happy, I wouldn't think it mattered a jot that he wasn't being stretched academically - that's strictly optional at this age, I think.) Don't know what the right answer is, though. What happened to the 2nd grade maths book? Did he finish it? More broadly, you said earlier that you were happy with his teacher - have you/can you talk to her about how he's feeling and improve matters that way?
