Didactic teaching aid, particularly for use in elementary school

摘要

The invented didactic teaching aid is intended particularly for use in elementary school. On a fundamental plate (1) there are perforated disks (3, 4, 5, 6) with various functions and a falling down pencil (18) is used. The disks (3, 4, 5, 6) of the proposed teaching aid are arranged in such a manner that above the fundamental plate (1), being on its circumference provided with a scale containing unit and decadic divisions there are a decadic disk (3) with a control handle (13), a unit disk (4) with a control handle (14) a result disk (5) and a cover disk (6). The teaching aid is accompanied by a foil (9) with openings (17) for problems, whereby when using the teaching aid the foil (9) is placed on the cover disk (6) and if the problem solution is correct according to a corresponding position of the decadic disk (3) and the unit disk (4) and by operation of result disk (5) the holes arranged in the fundamental plate (1) in the disks (3, 4, 5, 6) situated thereabove and in the foil (9) are aligned so the fall-down pencil (18) has contact through the mediation of a defined foil (9) opening (17) for that problem and holes for solution with the fundamental plate (1).