Team tables like these are great for regular instruction, but TERRIBLE for taking tests. With just a few sheets for cardboard and these dividing fasteners, your problem is solved!

I added some sections of PVC pipe that I slotted in order to add weight, keep the sheets straight, and keep the bottoms from sagging.

Quick setup and breakdown.

You can also get a peek at how using a heat gun to finish the bottom of rafted prints does WONDERS with the last two pictures. Last picture is a "before" and the second to last is an "after".