Learning Advantage Rekenrek 10 Row Counting Frame (CTU40051)

This rekenrek abacus features ten rows of two different colored plastic beads that easily slide back and forth on metal rods. An excellent teaching tool for building basic math skills in counting, addition and subtraction. Dimensions 8.27" x 7.87" x 3.54". This 10-row Rekenrek may look like an ordinary counting frame or abacus, however, it is used in a different way. The 10-row Rekenrek is an extended version of the standard 2-row Rekenrek, making it possible to use effective addition and subtraction strategies.