Your chemistry teacher will be fired and take your coursework with him so don't bother doing it in the first place because you'll just have to do it again.
One of your physics teachers will be **** so don't bother going to his lessons and just learn it yourself properly.
No matter how much your school nag you, their music ensembles aren't going to fall apart without you so spend half an hour of your time learning your part and don't bother going to rehearsals.
Your choir teacher, deputy head and headmistress are all in league together against you, you will get called into their offices for no apparent reason at least once a week and nothing will happen because of it because you're not doing anything wrong.
Your 'friend' who's been in and out of hospital isn't worth your time.
Take maths instead of geography because you'll get an A in maths and it will be of more use in the long run.