I wouldn't need all books all days, but some days I did. I didn't usually have a study hall. I'm not sure what learning has to do with it? I don't control how much homework gets assigned or when.

I'm a Junior in highschool and I have the same problems. Some teachers require you to bring all your books to their class every day. Others usually use textbook information to create PowerPoints which they use in class but it is still useful to have the textbook open to learn all the information which they skip. Students usually avoid carrying around textbooks by leaving most of their books in their lockers at school for most of the year but this makes it hard to study outside of school. They also cram all their homework during studyhalls and copy homework from others instead of actually studying though.