Addition-All Facts 0-12 Flash Cards Box

These durable, double-sided flash cards are great for home or classroom use. They are color-coded by fact family and feature the problem on the front without the answer and the problem on the back with the answer--making them self-checking. They feature a hole in the top corner that can be fit with a ring or string for easy organization and storage. Additionally, one corner is shaped differently than the others, making it easy to face all of the cards in the same direction. Includes 170 cards (all facts 0-12), each measuring 3" x 5 3/4", and instructions and tips for teachers or parents. For ages 5 and up