Your class will love using these dry erase marker holders/erasers. They neatly store the marker and cleanly erase the dry erase board. Individual dry erase boards are a wonderful way to bolster student engagement and these erasers are step up from the old socks or rags I have used previously. You will get a set of 30 holders/erasers. Dry erase marker not included. Custom fabric selections by special request. Machine washable.