Materials- Presentation 1:Two boards similar to the teen boards but with the numbers 10 – 90 printed on them.Nine bead bars of 10- Presentation 2: The ten boardsA set of loose cards from 1 – 9 Nine ten barsTen unit beadsPresentation 1: Terminology
Presentation 2: Boards and Beads
Presentation 1To teach the names twenty, thirty, forty, etc…and to show the child that twenty is two tens and so for the up to ninety.Presentation 2To teach sequence, the numbers from 11 to 99.
Control of ErrorThe child’s own knowledge.
Age 4 1/2 years onwards