Sounds like the Teacher has somewhat of a 'strict' nature, what happens if they sit together, is there a problem ,I didnt quite understand what you meant by ";parellel conversation, "could it be they talk when the teacher is talking, the teacher seems to have some attitude regarding your son, maybe it is a kind of control thing. Your son reacted, we all do that dont we ,or is it that children simply have to obey all rules and cannot act out of frustration.I dont think there is a problem with your son at all but if you are concerned by what she said get him checked out he sounds like a good positive child to me, Good Luck