DE1620874U - TEACHING MATERIALS FOR THE FIRST CLASS CALCULATION. - Google Patents

Description

Utility model registration: "Teaching aids for the first lesson in arithmetic" For the first lesson in arithmetic, what is known as the "calculating machine" is usually used as a teaching aid Device in which predominantly spherical bodies can be moved in a vertical frame on horizontal metal rods are arranged. There are usually ten rods with ten balls each. There. The device is large and takes up a lot of space, even when not in use it stands in the way or obscures any blackboard. Its main disadvantage, however, is. that for every calculation example, even if it is the addition of 1 and 1, the entire device must be used a.

According to the innovation, on the other hand, a very simple teaching aid is created, the essential feature of which can be seen in that it consists of individual bodies of regular shape, preferably There is cube shape, which are designed to be plugged together. The individual bodies are advantageously drilled or drilled through from at least four crossed sides, and a pin that quickly fits into the bore is used to connect any two individual bodies.

Cubes with an edge length of around 3 cm are suitable for demonstration.

They are made of wood, are easy and cheap to manufacture and can be stored in a drawer or box when not in use.

The new teaching material can also be used in a correspondingly smaller form for the Use the student himself to be trained. That has the special one The advantage that every student should participate at any time, not just when he is called to the blackboard can, so that his interest is kept awake and the idle sitting is avoided will.

The arithmetic dice are an ideal means of keeping the child from the object to lead directly to number abstraction and to the number function. This is possible by the fact that the student in first-rake lessons by his own doing, namely by stretching the dice 1. arbitrary quantities are arranged, 2. the Formation of groups of numbers in various forms by putting the dice together can represent, 3. by adjusting a "train of ten" and adding it of ones can illustrate the transition to the number system, 4. by sticking the cube can acquire an immediate idea of the power of the number, 5. that if you group a large number of "moves of ten" together, so do the students an intuition of larger units of numbers and thus a living idea receive.

The arithmetic cubes are the basis of the new calculation method of the functional Calculating.

Further advantages of the new teaching aid result from the following Description of an exemplary embodiment of the innovation based on the accompanying drawing, 1 shows a diagrammatic cube-shaped individual body and FIG. 2 shows a view shows an associated connecting pin. 3 and 4 illustrate application examples.

A cube a made of wood points to four opposing pairs Side surface holes bc, d, e, which emanate from the center of the surfaces and in the case shown, enforce the entire depth of the cube. To connect For two such cubes a, a short wooden pin f is used, which can be quickly inserted into the holes fits.

In Fig. 2, the addition of 4 and 2 is clear shown. Four cubes a are put together in a row g one behind the other. Two more Cubes are connected in a row h. Each row thus symbolizes one certain number concept. To add up, the two rows g and h are combined connected by z. B. the two left edge cubes put together by means of a pin f will. To carry out this calculation example you only need six cubes, the two components 4 and 2 of the invoice are permanently recognizable and z. B. by simply reversing, row g above and row h below, the interchangeability the line item can be proven when adding. Such vivid demonstrations are not possible at all on the usual "calculating machine".

This becomes even clearer in the example according to FIG. 4, in which three Item 4; 3 and 1 are added, with the bottom row i denoting the number 4, the middle row k denotes number 3 and the top row 1 denotes number 1 embodied. The three rows can be stacked in any order be set.

The connection of the rows in the illustrated succession can as in Fig. 3 only by plugging the left edge cubes together or as in Fig. 4 by putting together the first and last cube of the middle row k with the corresponding dice in the bottom row. This strengthens the structure which makes handling easier when several rows are put together.

Subtracting and multiplying can then also be carried out in a corresponding manner and dividing are demonstrated in a vivid and entertaining manner.

To calculate with different units, e.g. B. to add Objects of different kinds can be made of different colors will.

Of course, the individual bodies can also come from six, the surfaces be drilled or drilled through corresponding sides of a cube. In this case If necessary, each cube face can have a different color obtain.

Basically, balls could also be used instead of the cubes, however, cubes are best for joining and are cheaper to make.

Claims (3)

Protection claims: 1. Teaching aids for the first lesson in arithmetic, characterized in that it consists of individual bodies (a) of regular shape, preferably Cube shape, which are designed to be interlocked. 2. Teaching aid according to claim 1, characterized in that the individual body (a) Drilled or drilled through from at least four crossed sides and a pin (f) that fits quickly into the holes (b, eg d, e) for connection each two individual bodies (a) are used. 3. Teaching aid according to claim 1 and 2, characterized in that individual or all sides of the cube-shaped individual bodies have different colors.