The Pamphlet Collection of Sir Robert Stout: Volume 79
Numeration and Arithmetic
Numeration and Arithmetic.
In teaching arithmetic the ten rods composing the long stair previously described are used in conjunction with a set of the number symbols, cut out of black emery cloth, mounted on cards, and two wooden trays, each divided into five compartments, with fifty counting sticks.
Two number frames, with grooves to take a set of printed numbers, are also supplied to demonstrate the various arithmetical operations.
The retail price of the complete set of the Montessori material in England is £8 8s.