Directly translated, rekenrek means calculating frame, or arithmetic rack. Adrian Treffers, a mathematics curriculum researcher at the Freudenthal Institute in Holland, designed it to support the natural mathematical development of children and to help them generate a variety of addition and subtraction strategies - including doubles, plus or minus 1, and making 10’s.
The rekenrek looks like an abacus, but it is not based on place value columns or used like an abacus. Rekenreks have two rows of 10 beads, each broken into two sets of five. One set of five is red and the other set of five is white. They help support our students with the visual models needed to discover number relationships and develop automaticity. We loved using this math tool today in class. Ask your child to tell you how they used a rekenrek today. Very exciting!
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