How Many? activity cards build perceptual and conceptual subitizing skills with simple dot patterns on up to larger sets of dots in array and symmetrical patterns. Putting these dots into a grid format allows students to see the patterns and conceptually subititze larger numbers with great precision and speed. The Level 3 set presents dot patterns up to 100. These card decks are great for small group practice like flash cards or independent exercise as self-checking number words and numerals provide the answer on the reverse side of the card. Each level is color-coded so you can mix levels in a deck and then easily sort them back. Details: 5" x 5" card size 3 packs (50 cards per pack, 150 cards total) Grades 3 to 5 For ages 8 and up