Dealing with Spanish Teens

I have two teen classes in a comprehensive school in Madrid. The first are little brats who just simply don´t want to be there. They´re only there because their parents want them to learn English. They´d rather be playing in the playground with their mates. I have a student called Paul (not his real name) who exceptionally disruptive. He spendes most of his time fighting with his friend Dave (again not his real name) over reward points and other things.
The second teenage group, however, is totally different. They are like little adults and well-disciplined.