The 122x244cm green and matt Whiteboard usable with chalk . In schools, many teachers want to use the interactive whiteboard while still using chalk. “Sticks” remain perfectly suited to many educational situations – and they are less expensive and less polluting than erasable markers. This high gain green board (you can project onto it with excellent color respect) can be used either as an interactive “white” board or as a “black” board. The surface is unalterable (10-year guarantee) and completely matte (no reflection of the video projector on the background of the painting, whatever the power of the video projector)