This bright, ocean-themed, 120-grid floor mat set offers countless ways to explore number concepts through 120, from place value to addition and subtraction. In addition to the colorful mat, the set includes three inflatable cubes (two with digits 0"A 9 and one with +10, -10, +1, and -1), cards (to cover numbers), and frames (to highlight numbers, as well as 10 more/less and one more/less). The guide suggests engaging ways to use the set to address CCSS-aligned skills and concepts.