OP here. I would like to stress that he is not showing appalling behaviour. If he was, it would be easy to understand teachers sending him out and I would agree and move ahead with a new plan. What I'm saying is, at this school, they have a policy of sending children to the exit room after their third warning - they just call the big guy and he comes to get them. This means a lot of children in the exit room, missing a class, for low-level disruption. I'm not saying low-level disruption doesn't have a major impact on the learning of the rest of the class or that it is in some way OK. It must be dealt with, whoever causes it, regardless of their circumstances, with clear boundaries (as the teachers on this thread rightly say).
But many of the teachers can deal with him, and say he's a happy, enthusiastic and makes an interesting contribution to the class, once he's settled down. The teachers who consistently send him to the exit room are the very inexperienced ones who are faced with a big crowd of disruptive children (ours being mild in comparison with many of the others) and don't have
It's SO frustrating because he's trying really hard to improve and he can do the work fairly easily. He does behave badly, and believe me we are committed to changing that, but he's not swearing or throwing things, he's acting up to his friends. He has been brought up in a very liberal, hippy sort of home but he has basic respect.
I want him build his self-esteem (at least partly) through doing well at school and by teaching him it's not stupid to be clever. Whatever the teacher's side of the story, that's the job I have to do. This was not a planned adoption, we have taken him in from the broader family as he is an orphan.
I do agree teachers shouldn't have to do crowd control, but schools must find a way to deal with the ones that aren't perfect. The exit room system in this school is NOT working.
I'm grateful for all your individual comments and will reread this thread when the baby's in bed.