Switch to Crayons for Always-Ready Dry Erase Board Writing I wonder if this will work. We go through dry erase markers quickly. I need them to work on sheet protectors (which I use as dry erase boards).
mark each set of cards with a different color or color symbol. Then purchase soap cases at the dollar store to keep each set in and mark case with the symbol that is on the deck of cards in the case. store in larger shoe box sized container