One binder. Tabs. That's it.

The most efficient setup for multiple classes is one single binder with a divider tab per class.

Not five binders. Not a folder system. Not color-coded everything. One binder, four to seven tabs, and nothing else. You carry one thing, you grab one thing, you never dig through a backpack full of spirals. Binder is heavy enough to be a weapon.

The trick that makes it work: each section gets a two-pocket folder tucked