Use this versatile tool and Unifix Cubes to model and understand number concepts, base ten, and operations through 100. Comprehensive teacher´s guide includes illustrated activities for number relationships, addition, subtraction, multiplication, and division. Base is 3" x 9" with 10 positions, and includes 22 number label cards (10s, 20s, 30s, 40s, 50s) and 100-grid card to position behind stacks of cubes. Unifix Cubes are sold separately. 24 pieces per set, bundle of 3 sets, 72 pieces total