I agree that it could be very beneficial if you know any of the parents of the other students your son says are treated like that in class. It makes your concerns that much more concrete. Also, how big is the school? Is it possible to ask for your son to just be moved to a different PE class? Really it would be better to bring her attention to the people above her, but if it was possible to change who his teacher is, it would at least be an immediate remedy. If my daughter told me things like that I would be raising all kinds of hell. I was always one of the heavier kids in PE so I already am not fond of PE teachers.