A deck contains 30 laminated student ten-frame cards – 15 red cards, and 15 blue cards. The decks can be sorted by letter A, B, C, …O, enabling lost cards to be returned to their appropriate decks. All Classroom Kits are packaged with 30 decks of these student ten-frame cards. For teachers who have used the Power of Ten program and need to replace these cards (because they have been worn out or lost) these are available in packages of 30 deck sets.