Has the aide tried not taking him outside? I had this problem with the boy that I worked with last year. I took him outside for a walk and Mr. Long Legs ran away from me. When I finally caught him, I took him to my boss who explained to him that it was dangerous to run away from me. I told him that if it happened again (he was a limit tester) then he would have to miss P.E. He loved P.E. He wanted to be outside. He did it again. He had to spend P.E. inside for a day. He stopped running away.
Tell your son that the aide is like his own bodyguard, like the celebrities have. He's there to help if anyone bothers him. It's important for now that he accept this help.
The child who I work with most this year has O.D.D. I SEE when the other kids deliberately antagonize him. Since much of the time he is the one doing things to them, it's good that I am around to back him up when THEY are provoking him. Teachers miss a lot when there are 20+ kids in a room. More eyeballs help significantly.
