I think the conversation at this age with the class should be "we are all different" talks. You can bring up the ADS and how some children just think differently. If you decide to go through with the class knowing it about your son, then you MUST let him in on the secret before the class. It is not a good thing for everyone to have a secret and him to feel left out so to speak. It is not a good idea for him to hear it from classmates either. So I suggest, either you wait to tell the class or you do have a conversation with him. Go to the AuSM (Autism Society of Minnesota) and get some books. I can not think of them off the top of my head though. They talk about why "Tommy has the need for deep pressure & why he does not understand what others may find funny." We decided not to share it with the class by pointing my son out, but to discuss it as a general thing. When we had the general discussion in class, we were able to have the conversation at home. He was going to 3rd grade I think. Now that he is in 6th, we have asked him every year if he wants to tell his classmates and he has said no. He says "they know I am a little quarky, but they are okay with it, so why lable it." I guess with a reply like that, we just have to honor it. I can not believe he is the same kid that was nonverbal at 5. ~So maybe start with ________, have you ever thought about the fact you like thinks that not a lot of other kids seem to like.. Or _________, some kids are just not into trains the way you are. That is because everyone's brain is just a little different.~ If you go to the Autism Socity though, they have wonderful books. Ask Barb to suggest some and they will even let you borrow them. I hope this helps.