Math Manipulatives! Spark student interest in math by turning abstract ideas into somthng they can see and hold. Great for grades K-8. Cuisenaire Rods help students relate abstract ideas about numbers and shapes to something students can see and touch. They make mathematical ideas easier to internalize and frequently allow students to understand and solve problems they might not otherwise be able to solve. Provide endless opportunities to introduce, investigate, and reinforce key math topics such as addition, subtraction, geometry, measurement, multiplication, and division. Plastic rods are easy to clean and store. PRODUCT PERKS Great for exploring whole numbers, fractions, measurement, ratio, area, perimeter, symmetry, congruence, three-dimensional geometry, patterns, and functions. Cuisenaire Rods come in 10 colors — white, red, green, purple, yellow, dark green, black, brown, blue, and orange Each color and rod corresponding to a specific length from 1 centimeter to 10 centimeters — orange-10 cm, blue-9 cm, brown-8 cm, black-7 cm, dark green-6 cm, yellow-5 cm, purple-4 cm, green-3 cm, red-2 cm, white-1 cm What’s Included: 74 Plastic Cuisenaire Rods 4 orange 4 blue 4 brown 4 black 4 dark green 4 yellow 6 purple 10 green 12 red 22 white