Fun and versatile cards help students to visualize numbers 0-20 and learn 4 basic shapes - circle, square, triangle, and diamond. Each card shows the number represented as a ten-frame using the shapes. The cards support mastery of foundational math skills such as subitizing, counting, teen numbers, sorting, patterning, sequencing, comparing, ordering. Includes 4 cards of each numeral 0-20 for fact practice: addition and subtraction, multiplication. 84 cards come in seperate sets of 0-10 and 11-20 to differentiate beginner and advanced play. Students develop collaboration and communication skills as they play any number of games with the cards.