'Introduction to decimal quantity', a teaching aid consisting of trays of beads illustrating the decimal quantities 1, 10, 100 & 1,000.

Introduction to decimal quantity', a teaching aid consisting of trays of beads illustrating the decimal quantities 1, 10, 100 & 1,000. 2000. Following the teaching of Maria Montessori, the Montessori Centre produce educational aids such as this which introduces the concept of 10x10, and 10x10x10.