The Rekenrek System helps children visualize number relationships and develop strategies for addition and subtraction. Specifically, this system helps with subitizing, counting, addition, subtraction and multiplication. More efficient than counting by ones, the groups of 5 red and 5 white beads help children think in groupings of 5 or 10. Includes a plastic frame with 2 rows of 10 beads, with each row being comprised of 5 red and 5 white beads for a total of 20 beads. Frame measures 7 x 7 x 25cm and set includes 4 counting frames.