The Montessori stamp game is part of a set of parallel exercises used in math. The purpose is to help the child through their passage from sensorial to abstraction. This resource was designed and created by a professional curriculum designer and Montessori teacher. The purpose of these lessons/presentations is to: introduce the concept of exchanging 10s or regroupingshow the passages toward abstractionobserve the child's readiness to perform abstract operationsgive the child the opportunity to