Mathematics at the Primary level begins with a sensorial discovery of shape, volume, quantity, symbol, sequence, length, height, and width. From the sensorial awareness comes the more specific introduction of mathematic concepts including quantity/symbol correspondence, odd and even and the concept of zero.
Throughout the Primary curriculum, the children are learning to associate the knowledge they have gained from their sensorial experiences with the new information they are exploring with the mathematic materials. With concrete materials, the children are learning to identify quantity and symbols for numbers from 1-100. Once their understanding of these numbers is solid, the children are then introduced to the decimal system. Their exploration of the base 10 system will span the next few years in the Montessori classroom.