Abstract
The principle of learning mathematical concepts through the manipulation of concrete aids is utilized in this adaptation of the Papy Minicomputer for the use of blind and visually handicapped children. The device consists of three boards with cut-out shapes for the number values of one, two, four, and eight and multiples of ten and a hundred. Numbers are generated on the boards by placing pawns in the variously shaped regions; arithmetical operations are carried out by moving the pawns from region to region according to four simple rules.
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