A material used for teaching the number sequence from 1 to 100. The material consists of a wooden board printed with 100 squares and a box with lid containing chips printed with...
The Knobless Cylinders are the final stage in the dimensional material where the child, based upon his ability to discriminate, places the individual sets of cylinders in the...
These patterns serve as guides when extracting the square root on the Algebraic Peg Board. The material consists of 4 plastic cards with silk-screened square root patterns in...