Calculations, plotting, and graph practice are made easy with this dry erase board. Skip the waste of worksheets while students work on mastering their skills. Or use the board to present lessons and explain skills before students tackle workbook lessons. Use a standard dry erase marker and then simply wipe the board clean with a cloth.The board measures 11 x 15.5 inches and the grid measures 10 x 10 inches with 1/2-inch squares.