Recommended in Program(s): Challenge A, Foundations, Essentials Cycle(s): N/A These flashcards are an excellent interactive learning tool for teaching basic addition, addition facts and the commutative law. 2.75 x 3.75, laminated, with rounded corners, in a sturdy, reusable box 68 cards © 2013 Click HERE to view the Er Classical Conversations resource: https://classicalconversationsbooks.com/products/es026