This resource was designed and created by a professional curriculum designer and Montessori teacher.The addition strip board, subtraction strip board, multiplication bead board, and division bead board and the accompanying finger chart work is part of a set of memorization exercises. The purpose is to help the child through their passage from sensorial to abstraction, while memorizing operational facts.All presentations include:•Purpose•Direct Aims•Indirect Aims•Points of Consciousness•Step-by-s