A colorful learning deck for true comprehension of math facts. Three decks. Deck 1 - Dice Patterns (25 cards) Deck 2 - Ten Frames (75 cards) Deck 3 - Bar Diagrams (32 cards) Bonus! Reference deck for teen numbers Includes a guide for _spaced repetition_ - scientifically proven as the best way to use flash cards to master facts. Extra games and explorations mean Addtion by Heart becomes a playdeck once each deck is mastered. More ideas for play at mathforlove.com/add