Cuisenaire Rods help students transition from concrete to abstract representation of math concepts. For use with 4-6 students. Each color represents a different rod length that can be assigned a different numeric value or unit of measure. Rods measure 1 cm - 10 cm in length. Includes 50 white, 25 red, 16 light green, 12 purple, 10 yellow, 8 dark green, 7 black, 8 brown, 9 blue, 10 orange rods and activity guide. Grade K . 155/Set.