Math practice meets tactile exploration—with colorful match-ups students can’t wait to get their hands on! Children just select an activity card showing a number line or up to two 10-frames…touch and count the textured dots to subtract within 10 or 20…then find the matching number card to show their answer! You get 40 self-checking match-ups divided into 4 color-coded pockets, plus a guide. Pockets measure 4" x 9 3/4".