There was a nice post on the Maria Montessori blog the other day that talks about how the visualization of math ideas leads to a much better understanding of mathmatical concepts.
At the Columbus Montessori Education Center, we hear from many of our parents who feel just like the author in that post. The AHA! moment when watching a Montessori math presentation for parents often provides immense satisfaction for their decision to have their children in a Montessori school.
Read the excerpt below and then the original post and take a minute to read the comments also. Feel free to leave your comments regarding the Montessori approach to teaching math here on this post……
Take, for example, the relatively simple, yet seemingly complex, aspect of “borrowing” in subtraction. Am I the only one who was eternally confused by borrowing? I “got” how you were supposed to do it – you slash through this one little number and write this other number above it, then continue with the problem – but I didn’t know what it meant. Never did a teacher try to explain it to me; I was shown how to do it and then told to practice. Because I didn’t really understand what I was doing, I disliked any problem that involved borrowing and used a calculator as soon as we were “allowed” to.
Fast-forward to my … Montessori training. One morning, our trainer discussed the Golden Bead material which is used in Montessori classrooms to introduce children to math operations (addition, subtraction, multiplication, division). Following the philosophy of always starting with the concrete, rather than the abstract, the Golden Bead material is a physical representation of numbers. There are single beads, representing units (1). Ten of these beads strung together in a straight line by a wire, is called a ten-bar and represents a unit of 10. It literally has 10 beads on it. Take ten of these ten-bars and string them together to form a square and you have a hundred-square (again, it literally contains 100 individual beads). Ten of these hundred-squares wrapped together make up a thousand-cube.
As an aside here, isn’t it cool that the “square” of a number (10 squared = 100) is literally the shape of a square? And the “cube” of a number (10 cubed = 1,000) is, again, literally a cube? Why did no one point this out to me in school? (this one is big with Columbus Montessori Parents)
When our trainer introduced subtraction, and borrowing, I cringed. He used the materials to work through the problem – I would write out the process here but that makes it seem long and complicated (which it isn’t!), so instead I urge you to find a Montessorian who can give you a lesson. It works much better in person and is fascinating. When he got to the borrowing part, he demonstrated and, more importantly, explained the process. It was like a light beamed down from the heavens. I got it. It finally made sense. In my defense, there was an audible “ooooh” of understanding in the room from all the trainees!. Actually seeing the problem worked out with physical quantities made it much, much easier to understand.
That discovery was followed by many others as I worked with the Montessori math materials. It still amazes me how much I didn’t understand about mathematics. As a student, I started doing math on paper with a pencil; in Montessori the abstract process of math is the final step of a long series of exercises. To me, and most traditional school students, numbers on the page are just that – symbols we are taught how to manipulate. To Montessori students, those symbols represent very concrete ideas that they have physically manipulated; they fully understand what they mean, how they work, and why.
read the whole post here