I hve a 7th grader who has been the one to be the target for years. He was always a bit heavier than the others (think husky) and while he was not as physically agile as them (and was never as good a baseball player) he was always so smart and verbal and seriously, talked rings around these kids. So they called him all sorts of names and it even got a bit physical in 2nd grade.
I have always been on top of the situation. I talk to him about it, we talk about what he can say and do in various situations. He took karate for years as well. It was useless. He simply never got a group of friends, no one was ever interested in "having his back." Even now, the kids who are kinda his friends, when the "bully" kids call him names, they laugh along. Most say they don't mean anything by it, but this is simply not what friends do.
He has recently grown about 2.5 inches and lost 19 lbs. He looks great. Yet this Wednesday he came home from religious school to tell me that yet again, this one kid and his sidekick were calling him all sorts of names, basically fatso and cow. And this was in the sanctuary in temple! He says things back, tells them to shut up, tries to ignore them. Doesn't work and doesn't stop.
So the whole strategy of talking and teaching them to work through it, talk to the bully, all that stuff, to me is a crock. I now just tell him to stay away from them, keep his head down and wait it out. However with this one kid, if it happens again, I see his mother a lot and I'm planning on saying something to her. We have known this kid since kindy and they go to our synagogue. This summer, DS was in a Jewish day camp with this boy. It was our first year there, the other kid had been there for many years. He has a group and of course, they excluded DS, called him names, that sort of stuff. Luckily, one incident was observed by the counselors, who called the kid on it and even contacted his parents. I think they were totally unaware of exactly what kind of kid they are raising and the problem seemed to be better controlled over the remainder of the summer.
Well, now they are back at school and religious school and are together again. And he's starting back up, never around adults so no one really knows him. I really think I might have to chat with her about this. I stay out of it, but I'm getting kind of sick of this kid's continued obnoxious mouth to my kid (and he has even made fun of my 8 yo...what 13 yo does that?).