Very simply, my kids keep clipboards for the week, but use 3-ring binders for cumulative information.
Weekly Clipboards
For weekly loose pages of all their assignments, clipboards have proven to be the best organizer.
The clipboard easily allows my kids to transport easily secure, release, and transport weekly paperwork.
Random loose paperwork usually entail: schedule for the week, math, spelling, science labs, map, writing projects, etc.
Most importantly the schedule, at the top of the clipboard, allows for easy reference.
However Latin and Bridge to the Latin Road assignments, secured within the binder provided by LRTEG, are reference works in progress.
Cumulative Notebooks
At the beginning of each week the kids transfer all the old papers into the cumulative notebooks, behind tabs of the categories: schedule for the week, math, spelling, science labs, map, writing projects, etc.
Yearly Memory Book
At the end of the year, all the cumulative papers are sorted.
While most items go into the trash, other items are set aside for the memory book. .
After my kids studied the Ancient Cultures of the Mediterranean, they collected their favorite projects to put into a memory book that they showed off to extended family members curious about their schoolwork.