As a student, I disagree; it’s not too much. Many teachers give students time to complete homework in class, and a lot of them just do not take the opportunity. Students go to school to get an education, and I feel like they should have it as a priority in life.
However, I do think that more than ~3 hours (while working efficiently) is ridiculous, seeing as that time is not even including study time for tests and such. It’s all about learning time management.