This high quality wooden abacus is designed to allow students to perform basic operations and learn strategies for math. The beads are grouped in fives and tens and one side is marked with 1000, 100, 10 and 1. Display the Rekenrek so the whole class can see. Magnetic 10 bar Rekenrek is made of rubber magnet and includes 50 red and 50 white moveable magnetic 1" foam “beads” v . Also includes optional place value labels to show large numbers and operations on the Rekenrek that matches perfectly with the Horizontal Wooden Abacus (S92018). Measures 28”W x 20.5”H when fully formed. Class set of the horizontal abacus. Includes one demo magnetic 10 bar Rekenrek and 24 student horizontal abacus (S92018).