These magnetic algebra tiles make quick work of modeling algebraic principles and creating concrete models. The magnetic write-and-wipe shapes are excellent for whole-class demonstrations or hands-on student work. Includes 72 magnetic geometric shapes in a variety of sizes, with the largest piece measuring 12.5 cm x 12.5 cm and a write-and-wipe surface for your own labels. Size: 28.7 x 16.5 x 0.8 cm. Ages 11+.