I take a binder to school for my subjects (Sometimes use spiral bound books for 3U and 4U).
I then put these loose leaf papers into separate folders at home at the end of each week, although I rarely look at them again.
I have a set of notes on Google drive for each subject (Phys, Chem, English) along with essays, other peoples notes and soft-copy resources. For study, I purchased some small A5 spiral bound notebooks to summarise each dot point of Chem and Phys so I can revise the content, and make a helpful study tool for later.