The 18" x 13" tabletop pocket chart is portable, making it a great hands-on learning center for small groups or individual use. A self-checking feature allows students to work independently. The 10 clear pockets on the front can hold the tiles currently in use, and a convenient storage pouch sewn in the back stores all the pieces. Folds for easy storage.Two skills”sorting and patterning”can be taught with this easy-to-use set that develops kids™ early math and discrimination skills. First, they learn to sort by color, shape and category. Then, tiles depicting common shapes and colors are used to build patterns, developing important problem-solving and logical-thinking skills.