Make your own mini whiteboards for you classes to use. The pack contains loads of different types - isometric boards, squares, lined, graphs, etc. Print out and laminate whichever you need.
There are several ways to make a whiteboard. Depending on what your end goal is and the budget that you have to work with, one of these methods may work best for you. If you want to learn how to make your own cheap whiteboard or dry erase board you just need a few supplies and the time to put it together – going this route can save a lot of money and does not require much skill. The quality of a home made whiteboard depends on how you make it, just because the cost of a cheap whiteboard is low does not mean that it will look cheaply made.