Wentzke:SCHUBI Abaco 20

With this unique counting frame and calculating device, children experience numbers and basic operations in the number range up to 20 like never before. The transition over ten can be particularly clearly illustrated, as the steps up to 10 and beyond are always visible. The Abaco 20 is available in models A, B, or C - tailored to different teaching materials and methods. In the starting position, the balls are gray - which means 0. A small hand movement transforms the hemispheres. The activated, colored balls display the calculation process and the result. The advantages at a glance: exceptional clarity of the ten transition, stable, stackable, nothing gets lost, very easy to use, also suitable for dyscalculia therapy.