…wooden stamps of four types:
…green unit stamps printed with the numeral 1,
…blue tens stamps printed with the numeral 10,
…red hundred stamps printed with the numeral 100, and
…green thousand stamps printed with the numeral 1000
…box with three compartments each containing 9 skittles and one counter in the hierarchic colors;
…four small plates
One of each stamp is presented and identified, lain in correct order-units t the far right; thousands to the left. The teacher forms a number laying out the stamps in a straight column for each hierarchy. ‘Can you read this to me?’ Now the child reads a number from a slip of paper and forms the number with the stamps. After the child has done many exercises of this type, he will be ready to go on to operations.