I've got a kid in my class who instigates bullying. I think it starts off as friendly teasing, since he's an overly competitive person, but when others join in I think he gets carried away and comes off as really mean. They tend to gang up on one particular student, and I'm not sure how to intervene besides just asking them to stop or guilt tripping them. I don't want to take sides, either, because the student getting picked on will often say snappy things back. I don't have kids or siblings, so this is completely new territory for me. Help?