These are math mats for building numbers and working on 1:1 correspondence and spatial awareness. The boxes are large enough for legos, blocks, unifix cubes, etc. The mats are differentiated and in different designs from numbers 1-6, 5-10, Problem Numbers between 1-8, 11-14, 15-19, and Problem Numbers (5, 9, 2, 5, 12, 13)- 11 pages total. You can use them throughout the year, as centers, whole group and small group. Great for Preschool, Pre-K, and Kindergarten.