leave the homework at school!

we have 7-8 hours a day to do work! By the end of the day, I just want to go home and relax, BUT noooooo, i have to spend not only 8 hours on work, that i probably wont need in the future, and do another 1-3 hours on stupid homework! You would think that a one and a half hour day is enough time to do plenty of work! I think we should drop the whole concept of homework and leave it to the classroom!