A little homework per school night is good as long as the teachers coordinate that they keep it down to about one hour total per night and never more than two hours worth. Friday's assignments should be short that the students can get some sleep Sunday night instead of staying up late finishing their homework which never gets started until then, speaking from experience.
While I have the soapbox: The best math/arithmatic home work is about ten problems, where three cover new material, and the rest are review problems from the earlier chapters all the way to the front of the book. After keeping up with this homework, all exams are a cinch, as none of the material becomes stale.
Miss Celia Klotz (her real name) may have been a grey haired, dumpy, old maid, but this was her method and by golly if you did her home work you got through her class. Of course 40 % of your grade was based on your homework, 40 % on weekly quizes, and 10 % each on the midterm and final exams. And those quizes and exams each covered all the material we had covered up to that date.
I had 2nd Semester Trigonometry and First Semester Calculus from her and wanted to take Second Semester Calculus from her, but she didn't teach that one so I had to learn it from another professor who wasn't as good, but by then I had pretty good study habits so I pulled through.
This rant is over; so enjoy the rest of your Summer vacation and forget about school.