In hubbys last marriage his teenage step daughter was fond of slamming doors so he removed the doors one day and her reply to him was .......' you are so immature ! ' lol.

I would just reinforce that no matter what she says or does she IS going to school. I found the best way to get to teens was to try and turn it into a joke as they will laugh at themselves given the chance, they are as confused about things as we are I know I can remember hateing my parents from about thirteen to eighteen.

Being confrontational with them at the beginging of a problem normaly escalates it and makes it worse. However saying that, school IS important and its one of the things you wont compramise on that does not mean you are not willing to compramise on other things....

Good luck and remember it does not last forever.