Materials Spotlight: The Geometry Cabinet
Rebecca Lingo • February 26, 2024

Nestled on a shelf in our preschool and kindergarten classrooms (and elementary shelves) you’ll find a small wooden cabinet with six slim drawers. It may not look like much from the outside. Even when you slide out one of the drawers, you’ll see six square wooden divisions each with a blue wooden inset with a small knob in the center. As you continue to pull out the different drawers, you’ll discover that each wooden inset is a series of geometric shapes: circles that vary in diameter, rectangles with the same height but varying in width up to the square, different triangles, regular polygons, quadrilaterals, and curved figures. 


This is the Geometry Cabinet, an important and well-used material in Montessori primary (and elementary) classrooms. With a multitude of uses, this material serves to help children not only enhance their visual and muscular memory but also provide a foundation for advanced geometry work and preparation for handwriting.


The Foundation for Geometry


First and foremost, the geometry cabinet introduces plane geometry. Often, the initial lesson will be the equilateral triangle, square, and circle. These first shapes form a foundation in geometry: the circle calculates angles, the triangle constructs, and the square measures area. 


Another fun and detailed way to think about these three shapes is in terms of polygons. The equilateral triangle is the polygon with the least possible number of sides. The circle can be thought of as a polygon with infinite sides. The square represents the rest of the polygons. Of course, these facts are explored in our elementary communities. In the primary classroom, we use these distinct forms to provide children with the first impression of the three fundamental shapes in geometry and to introduce how to use the entire geometry cabinet. Imagine all of the built-in choices children have to follow up on. Wheaton Montessori students move quickly beyond the three introductory shapes.


A Tactile Experience


One of the first things we do with the geometry cabinet is demonstrate how to use the knob to pick up the shape with the non-dominant hand and then trace the whole perimeter of the shape with the index and middle fingertips of the dominant hand. We also show how to trace the outline of the aperture that the shape fits into. This careful, meditative action is designed to both give children a tactile impression of the shape and to help them develop the fine motor control necessary for writing.


Once children have this experience with a few shapes, they move on to tracing and matching the shapes from a whole drawer and then even mixing up the shapes from multiple drawers to trace and match into their aperture. When children get good at this process, we introduce taking away the visual sense by wearing a blindfold!


One of our Preschool and Kindergarten teachers, Ms. Chiste said “ The student’s favorite thing to do is paint each of the shapes them”.


From Concrete Objects to Abstract Symbols


We also introduce sets of cards for each geometric shape. In the first set, the figure is filled in completely. In the second set, each figure has a one-centimeter-wide outline. In the third set, each figure has a one-millimeter-wide outline. Children select an inset shape and go through the stack of the first set of cards until they find the one that matches the shape. Then they place the inset exactly onto its matching card. 


By placing the inset shapes onto the cards with thick to thin outlines, children are learning how an abstract symbol represents a concrete object. This is preparation for reading! If children can recognize and distinguish between a trapezoid and a parallelogram, they will be more likely to be able to distinguish two other shapes like a cursive b and a cursive z. When children have a lot of experience recognizing shapes, they will be more able to recognize the shapes they encounter in letters because symbols are shapes defined by lines. Think about the progression of abstraction from a filled-in trapezoid to the outline of a trapezoid, to the letter A.



Rich Language


As children are working with these shapes, our Preschool and Kindergarten teachers, Ms. Carr, Mrs. Berdick, Ms. Chiste, and Mrs. Rogers introduce vocabulary. Our young classrooms are alive with the rich vocabulary of quadrilaterals (rectangle, square, rhombus, parallelogram, isosceles trapezoid, right-angled trapezoid), curved figures (circle, oval, ellipse, quatrefoil), triangles (equilateral triangle, right-angled isosceles triangle, acute-angled isosceles triangle, obtuse-angled isosceles triangle, right-angled scalene triangle, acute-angled scalene triangle, obtuse-angled scalene triangle), and polygons (pentagon, hexagon, heptagon, octagon, nonagon, decagon). We offer them the exact names while our youngest learners absorb language effortlessly. For example, we say an acute-angled scalene triangle. 


Memory Games


We also use the Geometry Cabinet to play a series of sensorial games that help children perfect their perceptions and make their mental classifications conscious. You saw similar games demonstrated during our Parent Discovery night in January.


In the first memory game, the geometry shapes and their apertures are mixed up between two locations in the room, far enough apart to allow more time for children to hold the memory of the shape as they move through various potential distractions to find the match. The second game is a little harder because the shapes are placed in scattered locations around the room. When children go to find a specific shape, they must retain the impression in their memory for a much longer time and not be distracted by the other images they are receiving. In this process, children are exercising their skills of memory and recognition. 


The third memory game is one in which children try to find an object in the room that has the exact match of the shape. This experience allows children to move from working with the geometric qualities in their isolated form in the material to helping discover the qualities of the shapes in the world around them. They love getting a bowl as they look for circles or a hexagonal box to match with the hexagonal inset. Try this game together at home!


Learning through Mistakes


One of the aspects of authentic Montessori that I love is built-in controls for error. If a child tries to correspond a pentagon inset to a decagon card, there is immediate feedback, and the child can try again and again to find the match. The learner will explore the mistakes and corrections independently. Teachers will always observe when to step in if a key piece of information is necessary, but often experience is the best teacher


Multiple Benefits


While the main purpose of the Geometry Cabinet is to help children develop the visual discrimination of shapes (an important skill used in learning, especially reading), there are so many other benefits. The activity of tracing their fingers along the edges of the shapes and frames helps prepare children for using a pencil to make the shapes that form letters. Grasping the knobs helps them refine their pincer grasp. They learn important vocabulary. Because young children love shapes, they are driven to repeat this work which increases their concentration and focus. 


A simple material with so many benefits, the Geometry Cabinet is a material worth coming to see. Schedule your school tour by clicking this link and see children interact with this foundational geometry material. We are currently enrolling children under four years of age for summer and next fall of 2024.


Current families are invited to observe in our preschool, elementary, and adolescent communities. You can schedule your classroom observation by clicking the green buttons below.  


Adolescent Seminar Observation Ms. Searcy’s Upper Elementary Classroom Observation Mrs. Fortun’s Lower Elementary Classroom Observation Mrs. Mayhugh’s Lower Elementary Classroom Observation Mrs. Berdick’s Primary Classroom Observation Ms. Carr’s Primary Classroom Observation Ms. Chiste’s Primary Classroom Observation Mrs. Rogers’s Primary Classroom Observation
Children outside a building; title
By Suzanna Mayhugh, Lower Elementary Teacher January 19, 2026
Montessori Mayhem? Pint-Sized Pandemonium? When I give tours of the Elementary classrooms or welcome new parents to the Elementary program at Wheaton Montessori School, some parents believe that students are allowed complete freedom, as if the classrooms are a beautiful den of chaos and anarchy. Indeed, this is one of the biggest misconceptions about Montessori education. (The biggest misconception being, in my experience, that Montessori isn’t “real world” education. But as we say in our lessons, “That’s a story for another day.”) While Montessori classrooms DO give children the freedoms they require and deserve, it’s not an unlimited free-for-all with an adult watching from an observation chair! Freedom is always balanced with responsibility, to oneself and to the community. These values, freedom and responsibility, are essential for creating a happy, busy, humming classroom where children thrive. What Does Freedom Mean in Our Classroom? “Freedom” in the classroom means that students are encouraged to make choices about their learning. Just as in our Primary classrooms at Wheaton Montessori School, students are free to choose their work, their seat, and their work partners. They are free to move about the classroom and do not need to raise their hands to visit the restroom, get a drink of water, or ask a question. Let’s look at a few of these freedoms more closely. Students are Free to Choose Their Work. For example, they may choose which book to read, choose a work partner to research a chosen topic, or practice a tricky bit of a lesson over and over. They are also able to choose how they will show their understanding. They might present their understanding through a poster, a diorama, a model, a handmade book, or an enormous amount of cardboard and hot glue. These choices empower students to take charge of their education and express themselves in ways that suit their interests and strengths, something a standardized test or a worksheet can never do. However, freedom in the classroom ALWAYS has limits. For example, students are free to choose their work, but choosing NOT to work is not an option. They are free to choose their work from the lessons that have been presented to them. While students may choose their reading material, it must be appropriate for their reading level and classroom guidelines. When students select a partner, they must do so respectfully and inclusively. When students create projects and work output, they must do so with care, make proper use of materials, and in a way that shows what they understand about their topic. Additionally, these choices should never disrupt their own learning and construction, or that of their peers. The Role of Responsibility In a true Montessori classroom, freedom comes with responsibility. And that responsibility can sometimes be uncomfortable at first. Students are expected to care for classroom materials, such as returning books and lesson materials to the shelf, taking part in classroom jobs, keeping a record of their work in their work journals, and handling art supplies properly. They are responsible for practicing their lessons and completing chosen follow-up work, listening attentively during lessons or when a classmate is sharing a presentation or thought, and helping classmates when needed and available. A student is not free to use materials in a way that damages or wastes the classroom supplies or puts anyone in harm’s way. Freedom within our classroom never allows for harming oneself, others, or the classroom materials. Healthy boundaries, limits, and structures are consistently communicated in advance with clarity and respect, ensuring practicality and alignment within the community. Classroom expectations and rules are collaboratively developed and agreed upon by the community. In order to foster a positive learning environment, both students and teachers are expected to adhere to the shared expectations and responsibilities. When necessary, the classroom adult will address students and reiterate expectations and boundaries in a firm yet considerate manner. This balanced approach is effective only when maintained consistently throughout each day. What Might it Look Like When the Balance Needs to Shift? The adults in the classroom are constantly observing the children to be sure that each child has as much freedom as they are ready for, providing them space, room, and opportunities to show their strengths, and make their own choices throughout the day. When that freedom is too much, a teacher might need to provide more lessons in how to use materials that have been damaged or used improperly, limit work partner choices, or have a student sit with the teacher while they practice lessons or work with precious art materials. The adults will be watching for the perfect moment to allow the child increased freedom within the classroom, and within the limits of the understood responsibilities. How Freedom and Responsibility Work Together Finding the right mix of freedom and responsibility is something we work on together every day in our classroom. Montessori teachers are specially trained to guide this balance, helping students practice important skills like making good choices, solving problems, and learning self-control. When children are trusted to make decisions, they also learn to take responsibility for those choices. Experiencing the natural consequences of their actions helps them become kind, thoughtful, and capable members of their community who understand how their choices affect others. What Does This Have to Do with Parents? Your support at home makes a big difference. By working together, we can help your child thrive both at school and at home. Encouraging your child to take responsibility for their actions and decisions reinforces what they learn in class. Yes, it can be uncomfortable, but it is necessary. It also becomes easier, more comfortable, and needs to be practiced less often when practiced consistently (like most things!). This supportive consistency across settings, at home and at school, helps children feel confident, cared for, and increasingly independent.
Students in classroom with headline
By Kelly Jonelis, Adolescent Program Director and Math Teacher January 12, 2026
Where Learning Supports Who They Become Inspired by the Deep Dive on Psycho-Disciplines by David Kahn and Michael Waski In Wheaton Montessori School’s Adolescent Program, learning is more than content acquisition; it is a Psycho-discipline. A psycho-discipline is the connection of each discipline to the psychology of the developing human. When children and adolescents engage in subjects in a way that aligns with their psychology and developmental needs, the learning becomes internalized, and since discipline's root meaning is connected to “accepting with love”, they are supported to love learning. At Wheaton Montessori School, every subject your adolescent studies, from math, science, language, and literature to economics, morality, and culture, is intentionally crafted to support who they are becoming. We don’t teach disciplines simply to transmit facts. We use the subjects of humanities, math, social sciences, language, and sciences to strengthen your adolescent’s confidence, character, and capacity to participate meaningfully in society. This approach is deeply rooted in the Montessori work of David Kahn and Michael Waski, both pioneers of adolescent training programs and adolescent psyche work. They describe these subjects as psycho-disciplines. Psycho-discipline can be defined as the order necessary for self-construction. When children and adolescents engage with subjects in a way that aligns with their psychology and developmental needs, the learning becomes internalized. It becomes part of your children and adolescents. And when the curriculum is deeply connected and part of each individual, the result is self-construction that is whole, complete, interdisciplinary, and integrated. Wheaton Montessori School staff are trained to understand and respond to developmental needs and to aid your children and adolescents in loving to learn across the curriculum. We do this for adolescents by connecting the academic topics we cover to real-life applications that are meaningful and relatable for the student. Rather than teaching facts and skills in a silo “just in case” students may need them, we first present students with meaningful context and then move to presenting lessons that give them the tools they need to engage with that context, “just in time.” Psycho-disciplines: • Engage intellect and emotion • Build purpose through real work • Support the drive for belonging and contribution • Empower independent thought connected to others • Spark passion and identity formation Your adolescents learn to navigate complexity by applying their advanced knowledge to real needs. They learn academics best and enjoy them most when they use what they know to strengthen their community and improve the world. This applies whether they are solving problems that arise within their immediate environment or finding opportunities to serve the broader local community. At Wheaton Montessori School, 7 th -9 th graders engage in learning that is meaningful to them. They begin with recognizing authentic needs around them, extending the growing season in their gardens, keeping their chickens and bees healthy through the year, and then working to address those needs. When we provide the “big picture” first, students enter academic lessons with a clear understanding of why the content matters. Instead of teaching unit conversions or graphing equations in isolation and waiting for the question, “When am I ever going to use this?”, we begin with harvesting honey and ask, “What do we need to know to bottle and sell this honey? How do we determine the right price?” This is psycho-disciplines in action. Thermodynamics becomes relevant as students prepare their beehives for winter. Through this work, your adolescents also come to understand their value and place in the broader adult community, whether they are partnering with organizations such as People’s Resource Center or volunteering at Northern Illinois Food Bank. Learning through psycho-disciplines supports who adolescents are becoming and engages the work of the hand, head, and heart. Wheaton Montessori School adolescents don’t learn by memorizing facts, but by engaging and immersing themselves in meaningful work. This provides the means to learn lessons that speak to who the students are and to stick with them for a lifetime. Why Learning with Purpose Your adolescents are forming their adult identity right now. They are asking: How do I contribute? Where do I belong? Why does this matter? At Wheaton Montessori School, psycho-disciplines answer those questions through: • Meaningful collaboration • Real-world application • Guidance from experts and highly skilled mentors • Leadership and ownership • Choice and autonomy Instead of prioritizing the mere transmission of knowledge, we open the doors to further study and provide the order necessary for the formation of maturity and self-respect.