"To understand the Universe, you must understand the language in which it's written, the language of Mathematics."
- Galileo Galilei
Did you know that Montessori kids are introduced to geometry well before high school? It's true. And unlike what you may picture in your mind when you think of geometry lessons, this is actually a really enjoyable experience for all involved. Read on to see how we use the Montessori Geometric Solids with our preschoolers and grab your free guide.
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What are Montessori Sensorial Materials?
Sensorial materials encourage the development and refinement of the five senses. They isolate one sense at a time and have a built-in control of error. This provides the child with the freedom to self-correct without the aid of the guide.
What are Montessori Geometric Solids?
In addition to being just fun objects to hold and play around with, they are used to teach Geometry concepts such as shape (name, edge(s), vertex(ices), sides, base, stand), how they move, what 2d shapes they are comprised of, base shape, families of shapes, common shape combinations, and surface patterns.
Montessori Geometric Solids
These ten attractive and bright blue 3d geometric solids provide our preschooler with a sensorial experience while learning about the shapes that make up most objects found in nature. They are an excellent tool for refinement of order, stereognostic sense/perception, and understanding how objects in our environment consist of a variety of these shapes alone or in combination.
Prior to beginning any formal work with the Geometric Solids, our children use them in their open-ended play. After they're familiar with the look and feel, they begin formal lessons. For us, that means beginning with the introduction and Three-Period Lesson. Aside from learning the names of some 2d shapes as toddlers, this is their first substantial introduction to Geometry.
How We Use the Montessori Geometric Solids
- I introduced the sphere, the cube, and the cylinder and progressed through the three-period lesson until she had a mastery of that vocabulary.
- We also discussed how each of the solids felt and how they moved on her mat.
- We identified the shapes we saw on each solid, how many sides, if any, to each solid, and whether each solid had edges or a vertex.
- She also matched them to the 2d geometric plane figures that accompany the solids.
- We then played a game in which we each drew the 2d shapes on the easel, and had the other person fetch the matching solid.
- We discussed the difference in the vocabulary between the 2d and 3d version of each shape.
- Then we searched for objects in our environment that had the same shape.
- Once that work was completed, I added an additional solid to the lesson and repeated all the steps.
This is the basic procedure we have used for this geometry work, adding a new solid to the mat after each iteration that produces mastery of the work. Sometimes our kids jump ahead, which is cool, and ask about other solids. Our oldest's curiosity usually ended in laughter when she learned what some of the other solids are called. Rectangular prism was her favorite name. She threw her head back and giggled every time without fail.
Nomenclature Cards and Sorting Extension
Once they have an understanding of these four solids, I introduce the 3 part cards and a sorting extension to add interest to this work. The sorting activity contains real images and ties in well with our Montessori Solar System Unit Study as well as our current math shelf work. As kids increases in their understanding of each solid, we add the associated nomenclature card and sorting extension cards to their shelf work.
More Montessori Geometric Solids Activities
The next step could be introducing a blindfold activity as an additional stereognostic exercise. Also, introducing the concept of an angle adds additional vocabulary when ready.
In our case, once geometry is understood, it sets the stage for the practical application of that knowledge through art and everyday exploration. Kids will notice objects in their environment that have these shapes and they may proudly point them out. They may start to grasp the idea that once they have identified the shapes, they can use them to reproduce some of their favorite things on an easel or on paper. It encourages a lot of opportunities with art materials.
The Geometric Solids are a really fun Montessori material to work with while learning geometry. There are also plenty of opportunities to extend the learning. I can see why the Geometric Solids are a great segue to the Geometric Cabinet and all the learning opportunities that come with it. Be sure to grab your free guide above. It includes presentation and extension information for the geometric solids as well as the pink tower.
More Preschool Math Resources
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- Introduce the sphere, the cube, and the cylinder and progress through the three-period lesson until the child has a mastery ofthat vocabulary.
- Discuss how each of the solids feels and how they move on the mat.
- Identify the shapes the child sees on each solid, how many sides, if any, to each solid, and whether each solid has edges or a vertex.
- Match them to the 2d geometric plane figures that accompany the solids.
- Play a game in which you each draw the 2d shapes on the easel, and have the other person fetch the matching solid.
- Discuss the difference in the vocabulary between the 2d and 3d version of each shape.
- Search for objects in your environment that have the same shape.
- Once that work is complete, add an additional solid (the cone or whatever the child is interested in) to the lesson and repeat all the steps.
- Once the child has mastered the lessons with the four solids, introduce the 3 part cards and then a sorting extension to the environment. Give the child lessons on how to use these materials and it will extend their interest in the Geometric Solids.
- As the child increases in their understanding of each solid, add the associated nomenclature card and sorting extension cards to their shelf work.
Full Lesson Info and Pictures at: https://happyhomeschooladventures.com/montessori-sensorial-materials-geometric-solids-and-how-we-use-them/
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