Importance

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Abstract

A visual aid teaching device for translating one or more superimposed picture images in a linear path at different positions with respect to a stationary underlay picture includes as basic components: a pair of edge strip members, each embodying two or more channel tracks; a transparent, or opaque, rectangular flat surface member snugly mounted on the edge strips through their channel tracks to assemble the body device; sets of layers, each including a stationary underlay picture member and one or more superimposed picture image members. Both members may include algebraic graphs or circles divided into sets of sectors. The layer members can be mounted on the other channel tracks. Algebraic problem solving of compound inequalities in one variable can be demonstrated algebraically along with their graphic solution sets simultaneously by means of translating one or more superimposed graphs at different positions with respect to a set of number line graphs. The compound inequalities applied in this present invention include intersection or union of two sets of inequalities, inequalities with absolute values, inequalities involving a (second-degree), (third-degree) or higher terms. Other prescribed sets of pictures and superimposed picture members are used to induce rules for addition of real numbers and to depict operations of common fractions. Sets of picture and superimposed picture image members can be designed to demonstrate other mathematical concepts or geometric theorems.

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First Claim