Reinforce counting, 1-to-1 correspondence, base ten, addition and subtraction, operations, and more. Students position magnetic counters, then raise boards to show their answers. Magnetic write & wipe boards feature ten-frame on one side, doube ten-frame on the reverse. Includes 4 boards, 100 double-sided, foam magnetic counters (red and yellow), and Activity Guide. Boards measure 7” L x 6 1/4”H. Grades K and up. Ages 5 and up.