homework is something that you make up excuses for so you dont have to touch it...
<mom>hey have you done any homework?
<kid>no uh i uh dropped it in posion oak on the way home today
<mom>but your not allergic to posion oak
<kid>uh yes i am....uh....i am...uh...i gotta g outside!
Anything that consumes your time. Some of it is necessary, other times it is the result of your idiot Geography teacher spending 3/4 of class time explaining things irrelevant to your yearly mark, class work or anything. As for Math, it's just annoying sheets of paper that is made to help you revise what you learnt in class. I reckon the notes in the book are enough.
Homework causes stress, boredom and loss of time to do more important things or fun things. It's just an extension of school.