Too much homework

Homework is only distributed for students to gain better skills on the topic and pass exams. Depending on how large the exam is should, depend on the amount of homework. If the teacher gives the students a mandetory ***** that is not neccsary then it just the students time. (Even though most students feel like that is the case, it is not.) In certain collage courses homework is not manditory nor graded only the exams, depending on instructer.