Almost by definition, bullying is a problem that affects a minority of students. I'm not saying this to imply that it isn't a serious problem, just that it's so

Almost by definition, bullying is a problem that affects a minority of students. I'm not saying this to imply that it isn't a serious problem, just that it's sometimes difficult to get parents involved in their own children's education, let alone involved with an issue that isn't affecting their kids directly.