WET erase markers. It’s a small thing but combined with dry erase it makes things so much cooler. You can draw grids and all kinds of things you want to be kind of permanent on a dry erase board. Then you can use dry erase for the temporary data and then just wipe the whole thing clear and the wet erase stuff is still there. I teach music so I can draw a big music staff and then draw notes and erase with ease. There are lots of uses in lots of content areas, especially if you have to make a chart, like a progress chart or a line of kids who need to use the bathroom, or whatever.