Working in different school and different educational systems has allowed me to experience a new world of stationary! Oh yes, its true! You might be surprised, but the educational stationary "norms" actually change! At my current school we have these useful document wallets. They are made of study plastic but open around two edges to allow for easy access to put templates, grids, visible thinking routines etc inside. Don't get me wrong I still LOVE mini whiteboards (and in some ways have advantages over these), but enjoy having the versatility to swap in and out different papers. The picture below shows some of the different situations I have used them for.