Neely, a first-year in Betsy’s class, is introduced to the decimal system. Learning mathematical concepts in Montessori begins concretely and progresses towards the abstract.
Betsy gives Neely 1 unit bead, 1 ten bar (made of 10 unit beads), 1 hundred square (made of 10 ten bars), and 1 thousand cube (made of 10 hundred squares). Betsy names them, asks Neely to name them and allows Neely to hold and manipulate each item. This lesson provides Neely a sensorial experience of the decimal system which will serve as a foundation for her continued math work.