An excellent math manipulative which has two rows of 10 beads comprising of 5 red and 5 white. The groupings of 5 red and 5 whites, allow children to think in terms of groups of 5 and 10. It is a more efficient using the 5 and 10 as anchors for counting, addition and subtraction, than counting by 1´s. The Rekenrek manipulative allows children to visualize number relationships, and to develop various strategies for addition and subtraction. The Rekenrek is a very effective tool in understanding numbers and their relationships. Plastic frame with two rows of 10 beads, each row comprises 5 red and 5 white beads. 7 x 7 x 25cm, 20 beads. Set of 4 counting frames each measuring 2.75" x 2.75" x 9.84".