Students master math with fun to use regrouping kits that make complicated problems easy to solve. Each kit includes a place value regrouping tray and place value coins plus 40 self-checking problem cards. Students simply place a card onto the tray and use the colour-coded coins to visually represent the problem. Then students regroup the tiles and use the handy write & wipe activity mat to work out the answer. After solving, students flip the card over for easy self-checking. Complete set comes with all 4 kits shown, each with a guide write & wipe markers not included. Each kit also available separately.