He probably feels after all the pressure of SATs he wants to wind down and have control over something, but part of it could also be his age. My daughter is in Year 7 and the school planned some lovely things for the last few weeks, but it wasn't the same as learning for a reason. Obviously he needs to still be responsible and listen to you though. My daughter loves comp, but the first month was a real learning curve - there was lots to think about, new routine, moving around from lesson to lesson and learning school layout, having to remember everything, new friends, lots more homework. I know there's a while before then, but things should fall back into place.