Liven up learning as you help students understand abstract base ten concepts, including place value, estimation, operations, fractions, and more. Units are made of durable, washable plastic for years of hands-on activities. For 20 to 25 students. Grades: 1 .

Includes: 3 cubes; 20 flats; 200 rods; 600 units; Activity guide.

Common Core State Standards Alignment: Operations & Algebraic Thinking, Numbers & Operations.