The simple 10-frame grid on these cards is perfect for reinforcing number bonds for 10. Teachers will help students discover number relationships by using manipulatives within the grid, then move on to dry-erase markers to show concepts pictorially. Ideal for differentiation! Cards measure 4.75" x 7.75". Dry-erase marker not included. Each set includes 30 laminated Write-On Wipe-Off cards. Sold as 3 sets for a total of 90 cards.