I know this sounds strange but I've just started a new school and have had some issues with behaviour management as I am new, it is january, the kids are used to someone who has just left, and a few kids are making it impossible for me to teach. I've followed procedures not a problem in class. However one boy (y9) is holding a grudge for a detention 3 weeks ago. He is vile in class but also outide of class. He takes the mick out of my name, shouting it as he goes past my class and is getting other students to copy. As he doesn't do it in class, I don't quite know what to do.