● Quickly and easily demonstrate graphing concepts to the entire class. ● Large 1 in. ● square grid with bold x- and y-axes Spring-loaded roller allows for multiple fixed positions and retracts completely when ring is pulled down Hangs from top of a chalkboard or wall Tear-proof material lasts for years Includes hanging chains and track Squares with emphasized 5s for easier reading 20 x 20 coordinates with vertical number scale - and -axes are numbered +22 to -22