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These self-correcting learning tools are the original “teaching machines” for young children
in association with the quantities
At the time of this book's first publication (1948)
This wooden ten compartment box includes colour-coded plastic squares and rectangles
and confident children
Fourth Box of Colour Tablets - 32 pairs Blue box 6 (sight words) (Includes 1 Plastic Box) These self-correcting learning tools areThis is a supplemental box containing four matching shades of each colour: red, blue, yellow, purple, green, brown, pink and grey.
US$ 30.00
US$ 3833.41
US$ 712.08
US$ 60.00
US$ 340.12
US$ 230.90
