A delightful way for children to master new subjects and for adults to brush up on old ones! The front of the placemat is brightly colored, and laminated with a non-glare laminate. It features computations for subtracting numerals 1 through 12. The black & white back features facts covered on the front in random order, without information, so children can fill in the correct information under each picture with a wipe-off marker. Laminated surface wipes clean with a damp cloth. 17-1/2 x 12".