Help students understand abstract base ten concepts including place value, estimation, operations and fractions. These durable plastic units are ideal for teaching value and grouping while enabling students to easily manipulate and visualize varying numbers. The set includes 100 units, 30 rods, 10 flats, and 1 whole cube, enough for 3 to 4 students. It also includes a 112-page activity book. This Base Ten kit is ideal for small groups.