Teaching aid
OwnerRaymond C. Jablonskiinventor
Life of this patent
Estimating the term…
Abstract
A teaching aid procreated to develop learner participation in mental computation of number combinations involving all of the elements of basic arithmetic. Four elongated slide members are permanently housed within the confines of a frame member. Each slide member has the numerical figure indicia of from one to twelve printed thereon. The frame means has four windows therein. Each window is associated with one of the slide members whereby movement of the slide members will cause various numbers to be viewable therethrough. Arithmetic function indicia is printed on the frame member between the windows whereby various arithmetic problems can be displayed by movement of the slide members to cause selected numerical figure indicia to be viewable through the windows.
Claims2
A teachng aid for developing learner participation in mental computation of number combinations using a standard formula involving a combination of the functions of basic arithmetic, said teaching aid comprising:
- an elongated first slide means, an elongated second slide means, an elongated third slide means, an elongated fourth slide means, and a frame means;
- said frame means having an elongated first internal cavity for slidably receiving said first slide means, having an elongated second internal cavity for slidably receiving said second slide means, having an elongated third internal cavity for receiving said third slide means, and having an elongated fourth internal cavity for receiving said fourth slide means;
- each of said slide means including a plurality of numerical figure indicia;
- said frame means having a first window aperture for allowing one of said numerical figure indicia of said first slide means to be viewed therethrough, having a second window aperture for allowing one of said numerical figure indicia of said second slide means to be viewed therethrough, having a third window aperture for allowing one of said numerical figure indicia of said third slide means to be viewed therethrough, and having a fourth window aperture for allowing one of said numerical figure indicia of said fourth slide means to be viewed therethrough;
- said frame means include first arithmetic function indicia located between said first and second window apertures, including second arithmetic function indicia located between said second and third window apertures, and including third arithmetic function indicia located between said third and fourth window apertures;
- said first, second and third arithmetic function indicia coacting to create a standard formula involving a combination of the functions of basic arithmetic, said first slide means being movable within said first internal cavity for allowing various ones of said numerical figure indicia of said first slide means to be aligned with said first window aperture, said second slide means being movable within said first internal cavity for allowing various ones of said numerical figure indicia of said second slide means to be aligned with said second window aperture;
- said third slide means being movable within said third internal cavity for allowing various ones of said numerical figure indicia of said third slide means to be aligned with said third window apertures;
- said fourth slide means being movable within said fourth internal cavity for allowing various ones of said numerical figure indicia of said fourth slide means to be aligned with said fourth window aperture.
Dependencies are inferred from the claim text.