Have students independently practice adding numbers with sums up to 20 with these self checking addition cards. These cards make an excellent math center or early finishers activity. They can also double for flash cards or small group/game cards. Students will write down and solve the addition problem. Then, the student will open up the card to see if they solved the problem correctly.
This product contains all the directions you need for making the cards. This set contains all addition facts for sums between 11 and 20.