Montessori Abacus Official: Identifying the Genuine from the Imitation
of reading - words
While the abacus is a key tool in Montessori education, not all abaci follow Montessori pedagogy standards.
However, the Montessori abacus is generally more expensive than a standard wooden abacus.
As a parent, you may wonder if the Montessori abacus truly offers an advantage worth its extra cost.
This is exactly what we will discuss in this article.
Montessori Abacus vs. "Classic" Wooden Abacus
Montessori Abacus
"Classic" Abacus
Let's compare these two abaci. To the untrained eye, they are quite similar, and it's not necessarily obvious why one is considered a "Montessori abacus" and the other is not.
The first was designed by Maria Montessori herself for use in the classroom.
First, let's examine the similarities. Both are wooden frames with horizontal wires or pegs, each holding ten beads. Both can be used for addition, subtraction, and, with a bit of ingenuity, for multiplying whole numbers, so both can be considered math calculation tools. But that's where the similarities end.
Montessori math materials are much more than simple calculation tools: they are "materialized abstractions," meaning they are designed to embody mathematical concepts in a clear physical form.
The classic abacus does this to some extent: the beads can represent different decimal places (units, tens, hundreds...) in the base-ten system, hence the ten beads on each wire, but this is not explicit.
How to Use the Montessori Abacus
How the Montessori Abacus Works
Notice on the left side, the decimal categories are explicitly written in numbers: 1, 10, 100, 1,000.
This allows children to clearly know which quantities each row represents. Furthermore, the left section uses three shades of gray, which group the different families of decimal categories:
- the simple family (units, tens, hundreds),
- the thousands family (thousands, ten thousands, hundred thousands)
- the millions family (millions, and you could continue with ten millions and hundred millions).
Additionally, the bead colors are not random and are not there just for aesthetics: the colors repeat in groups of three to emphasize the repeating pattern of "units, tens, hundreds" within each decimal family.
Montessori Abacus Chart
The Montessori abacus is used with another special tool:
the Montessori math chart.
This chart contains special lines designed to represent the rows of digits.
This allows children to begin making the transition between the concrete representation of numbers on the abacus and their representation on paper.
The chart helps children correctly identify the quantities on the different rows of the abacus.
Download the Montessori Abacus Chart (PDF Format)
Choosing a Montessori Abacus Over a Classic Abacus
You now know what makes the Montessori abacus special. It can obviously be used, along with its method, outside of Montessori pedagogy.
If Montessori pedagogy interests you, we recommend our article Montessori Pedagogy: Advantages and Limits and the blog Discover Montessori.
Nevertheless, it remains that the Montessori abacus, while a powerful educational tool, cannot be considered "the ultimate educational abacus."
Outside of its specific method, it is ultimately not very different from the classic abacus. If your child has already mastered the first 5 decimal places, it might be more beneficial for them to directly learn the Japanese soroban (or the Chinese abacus), tools that are more efficient to use and abstract away the need for a calculation chart (even though they can be used with one).
To learn more about choosing an abacus, we invite you to read our article on selecting your abacus: How to Choose an Abacus
If you are looking for a Montessori abacus, why not check out our collections? We have both existing variants: 4 and 7 rows.
