SYMBOL RECOGNITION TEACHING DEVICE

摘要

A device for teaching symbol recognition includes a plurality of sets of shaped configurations forming a partial outline but camouflaging a symbol having a value equal to the number of elements in or representing objects displayed by the set of configurations. The numeral "2," for example, is inherent in and partially outlined by a set of configurations having two elements. A masking card when superimposed upon the set of configurations together with exposed or unmasked portions of the elements of the set instantaneously forms an outline and background to display the symbol.