Shake Box: Number Bonds

Shake Box makes number bonds visible: shake the counters and watch them land on two sides. Cover one side, let children guess how many are hiding, then lift the cover to check. This builds strong mental images that connect with numbers and number sentences – until children can work with the numbers alone. • Guess first, then reveal: a number pad right on the cover; numbers larger than the whole can be locked • Arranged like a real shake box: five in a row, then the next row on top (the structure of five); ten frame, dice patterns and more to choose from • Part-whole model and fact family: addition and subtraction for every split, with the whole and the parts in color • Number bonds house: collect and order all the ways to split a number • Adjustable number range; shake evenly or like real counters • Share via link or QR code; English and German • No ads, no data collection, works offline Developed in close collaboration with Hans-Joachim Lukow and Angelika Albert of the Osnabrück Centre for Mathematical Learning, for use alongside the German Schüttelbox program. For pre-K, kindergarten, first grade and math intervention – at school and at home.