Lore's made some very good points there, and I DO know how frustrating this must be for you and your son, kitten, but we, as adults, can control how we react, yet maybe your little boy can't. Shouting at him won't help at all, although I fully understand how you feel. If he can't verbally express himself, then school's going to feel alien to him, and he'll start to tug at children's clothes to get attention - which in turn'll make others think that he's being nasty. Please speak to all the teachers, & get as much professional help as possible. My own son used to hide under desks & wouldn't participate. It was misery for him, as well as for us parents, but when you speak to your son, do so in a gentle manner so that he learns from you. Btw, my own son's 9 now, and doing brilliantly. Best of luck. x