Good idea to use for graphing! I prefer it turned the other way in order to fit more students in a straight line. I can still use the categories I have with the velcro dots on the back. I can use the big pan from Sam's or the large magnetic board I haven't been using : )
Oil Drip Pan Chalkboards! Spray prime the drip pans with gray primer, and then use latex chalkboard paint. Tape a border around the edge of the drip pan so it will create a 'frame' of sorts. Hang the boards/pans using 3M Command Strips (4 medium sized ones did the trick).