younger son. This comes a while after he poked another TA in the eye, which I posted about. At the moment, the school are insisting that they can meet his needs and that they don't want him to go. They have identified a potential issue and changed things round to make sure it is solved but he will be 13 next, he's taller than me and he's getting more aggressive. The head said to me that "he's only going to get bigger" which of course is true 
He isn't able to tell me what's going on, isn't able to explain or even identify his emotions. I drew a cartoon strip with him, trying to tease out the events leading up to him thumping his TA, and also drew a variety of faces (happy, sad, cross, scared - with the words next to them) with tick boxes in the hope he does understand his emotions he just can't express them, and wrote 5 reasons for hitting the TA, also with tick boxes, but he just ticked the last box in both cases without looking. So I don't feel he actually understood.
When I went to fetch him after the incident, he was totally baffled. He couldn't even answer the question what's happened.
I'm thinking it could be the sudden surge of puberty hormones, do you think that's it? Did you see an increase in aggression at this time?
They're back tomorrow and I want to be able to say or suggest something but tbh I am at a loss. any ideas?