Talk to the pricipal to suspended him

Search for some very professional articles about bullying on the web and copy their professional wording and tell school how bad his bullying affect your kids normal schooling and his normal behavior and BTW, he is hesitating to school now, then the pricipal will talk to his parents, most of time he will move to another school in next semester. It wroks for me, my kids talked with me several times she doens't want to go school anymore after 3 months' bulling by a chinese and american mix girl, I have to do this. believe me your wording will kick him out that school and other kids will not do the same bullying to your kids anymore.