I use a backpack... everyone at our school does. The school is two floors, and each floor is split into 2 levels. Its really confusing at first, but once you get used to the layout its really cool. Plus, there are also temporary buildings outside. We have 8 minutes to get to each class, but i still can't go to my locker between every class. No one uses the rolly backpacks, b/c they're hard to take up the stairs (there is an elevator, but its only for special circumstances) and the halls are too crowded. Backpacks are also cool if your a girl b/c then i can shove my makeup bag, hairbrush, etc. in there.