Homework makes us revise what has been taught to us in the classroom. I am sure that most of us revise our lessons only to be able to do homework. Also stress caused by the need to complete the work often push us to work harder as as humans are generally more productive under stress.
Homework is pointless. If we wanted to revise, we would study. Extra school would be more useful to the average person then sitting at home. Students can break down under stress and stop trying, it doesn't necessarily push them to work harder in school and at home.
(I'm sorry if I don't have good points, this is my first debate)