Addition and Subtraction Mats KitEnhance your classroom centers with colorful, engaging mats that appeal to children as they learn and develop essential skills for academic success. All-in-one kit includes 10 colorful two-sided write-on/wipe-off mats (10" x 7 1/2"), one wipe-off crayon pack and an activity guide with suggestions for use. Count on these turtles to help your student learn essential math skills. Includes 72 easy-grip pieces. Games/Manipulatives Type: Math Game; Age Recommendation: Grades K-2.