Field of application from the 1st to the 6th grade

Practically developed and tested by Pruefl with active educators.
It consists of a plate printed with the numbers from 1 - 100 with 100 ring-shaped millings, matching wooden box and wooden rings in the 10 Montessori colors for the numbers and black rings for the prime numbers. The material is used for the complex development of the number range up to 100.
The rings can be placed and stacked in a targeted manner thanks to the milled recesses .

The rings always show the printed number. (in contrast when using chips)
100 red chips are also included in the scope of delivery to cover many other jobs in the hundreds.

This enables: the structure of the numbers up to 100 to be clearly displayed, the series of paint to 100 to be laid out, the prime numbers to be worked out (sieve of Eratosthenes), the smallest common multiple, but also the largest common divisor (to be used by multiple assignment of a number with several number rings).

Order matching workbooks PART 1 and PART 2

Additions 90 red rings 100 chips replacement rings ring stand
Further explanation and information about the ring board

The children experience counting and orienting themselves on the hundreds table. Which number is where, predecessor or successor, the knowledge that all the same ones are arranged vertically and all the same tens are arranged horizontally. The chips included in the scope of delivery can also be used in this phase of learning. Cover numbers and ask what number is hidden under them, or give orders to cover different numbers. Countless exercises for consolidating the number space are possible here.

Another way to work with the ring board is to work out the 1x1 rows. Since usually only up to 10x ... are worked at the beginning, the ring stand is used here. There are 10 rings per color on the stand, except black, in increasing color = number sequence from 1-10. The control takes place over the own pattern, which shows each painting row. Of course, the children are allowed to lay out according to the pattern. It is about automating the 1x1 rows. Many children already go beyond 10x ... because it is exciting to know how much is 15x3 and that you can also calculate that.

The next step is to lay out "related" painting series, e.g. 3,6,9. Here it becomes clear why the board is called "ring board" and not 1x1 board or similar. Because now rings are placed on top of each other. So are z. B. when laying out the painting series of 3.6, u.9 on the number 18 three different colored rings. At the latest now you should introduce the terms "divisor" and "multiple" - the board clearly shows what belongs together.

Prime numbers: If the child now displays all of the painting series up to 100, following the Montessori colors, some fields remain empty. The prime numbers are thus clearly visible. Now the ring board is also an exciting tool for older students, here you can use concrete material, without paper and. Pen develop the divisibility rules and the prime numbers in the number range up to 100. Control also forms the already known structure of the painting series.

Prime factorization: Perhaps the most interesting detail of the ring board is that the board can be used for prime factorization and consequently for the determination of PGD and kgV. With the ring board this is easy and clear. For example, the child marks the number 18 on the empty board with a chip to avoid confusion. Now you start with the smallest prime number 2, say 18: 2 = 9 and put the green ring for prime factor 2 on the 9. Now the smallest possible prime number is 3. 9: 3 = 3, a pink ring comes on the 3rd smallest possible prime number again 3, 1 pink ring comes to 1. Now the designed rings are collected, sorted and the corresponding numbers are written down, in this case 1 green and two pink rings, ie: 2x3x3 = 18, the prime factors are 2.3, 3rd The determined prime factors of the numbers then only have to be combined and calculated accordingly for the determination of PGD and kgV of two or more numbers.

Because of the wide range of possible uses of the ring board, this material is suitable as a work material for children from the age of 3 and accompanies the children up to the 6th grade and beyond. The rings are robust, easy to grip and should rings get lost, you can of course reorder at any time, some replacement rings are already included.