Here's an interesting 3 ring binder for your papers (or your clear poly slotted Sonic cards collection...) It is made of hard thick card, with modern CG Sonic & Knuckles art. Likely, this is a glossy over-layer for the card. Since it's CG, they're in new poses which keeps the art fresh (notice different poses for the spine art) Knuckles, however, looks like he was about to talk (or sneeze?) when the CG shot was taken.
Note: Card based binders like this aren't really that great for heavy-use situations because the corners can deform and the art can scratch. If you're aiming to collect this, it might not be great for actual school use.