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Braille Input
Braille writer: One of the first attempts to increase the production of Braille writing was the mechanical Braille writer, the most common being the Perkins Brailler. The mechanical Braille writer operates like a typewriter. It has six keys, (each representing the individual...
STANDARD 7 - GEOMETRY AND SPATIAL SENSE
geometric reasoning, and intuition to arithmetic and algebra problems. The use of a rectangular array to model the multiplication of two quantities, for instance, has long been known as an effective strategy to aid in the visualization of the operation of multiplic...
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