homework shouldn't take more than an hour or two every night.
this brings me on to another thing
homework is a bullstuff concept that shouldn't exist in the first place.
doing schoolwork out of school during time that you should be taking to relax from being in school for ~8 hours?
homework doesn't even reinforce stuff like it's supposed to. it's just busywork that guarantees you a grade.
grades matter more than learning in the modern education system
a physical science class that i recently failed had literally no classwork, a test every friday, and around 10 pages of homework to do every week