This classroom set includes 12 durable masonite lap boards that are dual sided, plain white and lined. Boards are 9" x 12" . Also included are a box of 12 Pocket style dry erase markers with bullet tips in black and a 12 pack of 2" multi-purpose erasers. An environment friendly way to learn, as you just write, wipe off and re-use with no waste.Markers are AP Certified, Conform to ASTM D-4236.