Gah! To much homework!

Why do all teachers think that their subject is the only one? They're always like: "Yes I know I'm setting you twice as much homework as normal, and on THE WRONG DAY so you get even more from other teachers, but it's OK; you've got a week to hand it in!". Yes, but throughout the week I'm getting MORE HOMEWORK FROM OTHER TEACHERS! Combine this with the fact I've got about three pieces of coursework that I need to be getting on with, and I am NOT a happy bunny!