Our Montessori Dictionary

LakeCreek Montessori School • December 3, 2024

We recognize that Montessori education can have some lingo that might need a little explanation. So in this Montessori Dictionary post, we’re going to focus on a few terms (some familiar, some perhaps not so familiar) that apply to both the early childhood years and beyond. 


When possible, we’ve included some quotes from Dr. Maria Montessori and we encourage you to take a look at her work. Dr. Montessori was a woman well before her time and her books, such as From Childhood to Adolescence and To Educate the Human Potential, can be a source of insight and inspiration!


Grace and Courtesy


Grace and courtesy is an essential aspect of Montessori environments and supports children as they develop social relationships. Grace is how we move through the space around us, and courtesy is how we treat each other. 


In the Montessori primary classroom, grace and courtesy is considered one of the areas of practical life. For example, adults give lessons on how to interrupt, how to accept an offering, how to offer help, or how to introduce oneself. These lessons are offered in small groups and the technique used is role-playing. Little social scenarios are acted out and provide a model for behavior that is situational. Like all other learning activities, grace and courtesy lessons are practiced and repeated. They provide a respectful way of learning expectations and aiding social skills before they are needed.


Grace and courtesy is never offered as a form of punishment or correction. We make sure children don’t experience embarrassment by being corrected by adults on the spot, as this makes children feel disrespected and not safe. Dr. Montessori reminds us of this in The Secret of Childhood: “I have come to appreciate the fact that children have a deep sense of personal dignity. Adults, as a rule, have no concept of how easily they are wounded and oppressed.” In time, if we offer these grace and courtesy lessons, and give children a safe place to practice, children will eventually perform these skills independently. 


Human Tendencies


Human tendencies are unconscious, universal drives that support our adaptation to our particular time and place. All humans are born with innate needs and drives and are wired to adapt to their environment. The human tendencies – to orient, explore, order, abstract, imagine, calculate, work, be exact and repeat, perfect oneself, and communicate and associate with others – help aid this adaptation.  


Dr. Montessori alluded to human tendencies when she wrote about the inner drive she observed in children and how this drive helps individuals construct themselves to develop into maturity: “Their behavior led us to become aware of a fundamental truth, namely that the child works for his own inner development and not to reach an exterior aim and that when he has done this work he has not really developed a special ability but he has developed something in himself.” 


Prepared Environment


The Montessori environment is carefully prepared so that children can satisfy their human tendencies and thus develop to their fullest potential. The prepared environment takes into consideration what children need at their particular stage of growth, and as individuals on their own trajectory of development. The prepared environment consists of the physical and psychic aspects of the environment, of which the adult is a key part. 


Through interactions in a prepared environment, children can construct who they are as human beings. As they go through this process of self-construction in their environment, children learn, grow, adapt, and create. The prepared environment is part of the triad of the child, the environment, and the adult, all of which are interconnected components. 


Sensitive Periods/Sensitivities


Dr. Montessori was first and foremost a scientist and she was interested in what was happening prior to observable signs of human development. She was curious about what was going on in the mind before the skill manifested itself. For example, she wanted to know what was happening during the many months prior to children speaking their first word. 


Without the high-tech tools that neuropsychologists and psychologists now have to measure brain activity, Dr. Montessori had to rely upon observation. She watched children, took notes, and made charts about what they did. As a result, she discovered that a particular object or aspect of the environment would have an irresistible draw for children. This attraction would last for some time. Children would keep going back to the same activity or element of the environment and would be continually drawn to it. Then the day would come when it held no more interest and something new would be attractive. 


Dr. Montessori observed this phenomenon over and over again, which led her to believe that there must be something innate in children that was driving this interest. Building upon the work of biologists, Dr. Montessori adopted the term, sensitive period, to describe transitory periods of psychic development. Beyond the Montessori world, sensitive periods are now referred to as critical periods or windows of opportunity. 



What does a school look like that focuses first on grace and courtesy, human tendencies, a prepared environment, and sensitive periods? Schedule a tour to see for yourself!


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By LakeCreek Montessori School • June 24, 2026
Have you ever watched a child trace the outline of a window with their finger, or carefully line up blocks into a perfectly symmetrical row? They may not have a name for what they're doing, but they are already exploring geometry. Dr. Maria Montessori understood that geometry is not an abstract school subject. It is part of the world children live in from the very beginning. A glance at the typical geometry textbook might suggest otherwise. Formulas, diagrams, and definitions can feel remote and lifeless, something to be memorized and forgotten. But look around for a moment. There is geometry in the angles of a mineral crystal and in the symmetry of a butterfly's wings. There is geometry in the legs of a chair and in the steel girders of a bridge. Children encounter it everywhere! In fact, research suggests that a basic intuitive understanding of geometric concepts may be inborn in human beings. A fascinating study of the Munduruku (an indigenous group living in the Amazon whose language includes very few spatial or geometric terms) found that both adults and children demonstrated an intuitive grasp of basic geometric ideas. This isn't something they were taught. It was already there. Montessori classrooms build on exactly this kind of inborn understanding. From Sensory Experience to Big Ideas In the early childhood years, children work with geometry through their hands. Materials like the Constructive Triangles, the Metal Insets, and the geometric cabinet give children a felt, physical understanding of shape, symmetry, and form before we introduce any formal terminology. Children gather and store these impressions. Their minds are being prepared. As they get older and certainly in the elementary years, children are ready to bring names and reasons to what they already sense. Elementary-aged children don't just want to know what something is called. They also want to know why. Why is this shape called a pentagon? (Spoiler: Its name comes from the Greek word for five: pente.) Geometry becomes a doorway into the history of language, ancient Greece, and the lives of mathematicians like Thales, Pythagoras, and Euclid, who puzzled over the same ideas thousands of years ago. This is the spirit of Cosmic Education when we pull one thread of curiosity to find it unravels into history, language, culture, and mathematics! Geometry, Algebra, and Arithmetic Woven Together One of the things that makes Montessori's approach to geometry so distinctive is that it doesn't stand alone. In the Montessori classroom, geometry is part of a three-part approach to mathematics, interwoven with arithmetic and algebra in ways that make each of them easier to understand. The Binomial Square is a good example. It presents the algebraic expression of (a + b)² = a² + 2ab + b² as a geometric pattern of squares and rectangles that children can actually build and hold. The arithmetic follows the pattern. The pattern confirms the algebra. Each one reinforces the others, and the whole thing is far more memorable than just a formula written on a board. Open-Ended, Creative, and Genuinely Fun Plus, a lot of Montessori geometry work has no single correct answer. We invite children working with the Metal Insets or Constructive Triangles to find as many equivalent figures as they can for a given shape. There may be dozens of ways to approach the same problem. This open-endedness nurtures the creative, analytical thinking that elementary children are hungry for. Plus, this quality of thinking will serve them in every area of life. Compass-and-straightedge constructions are another example. These beautiful, precise drawings challenge children in a way that is both mathematical and artistic. Many children find them deeply satisfying. What This Looks Like at Home You don't have to wait for the classroom to feed your child's geometric curiosity. Point out the shapes in a honeycomb. Notice the angles in a spider's web. Talk about the tiles on the floor or the panes in a window. Ask your child questions. Do you think that could be a triangle? How many sides does it have? These small moments of noticing are the same thing Montessori described when she wrote about preparing the environment to reflect the world children already live in. Geometry is already there. We're simply helping children see it. Come visit us in LakeCreek Montessori School to see how this unfolds in the classroom and to watch children fall in love with one of humanity's oldest ways of understanding the world.
By LakeCreek Montessori School • June 24, 2026
unfold over time. Children begin with a single frame and inset, using three colored pencils: one for tracing the frame, one for tracing the inset, and one for filling in. As their control deepens, subsequent exercises introduce the use of insets only (without frames), multiple overlapping shapes, repeated tracings of a single shape in different positions, and eventually fully free geometric design using any combination of insets, colors, and orientations. One of the most beautiful exercises is graded color. Using a single inset and a single pencil, children fill the shape with vertical lines, moving from darker to lighter (or lighter to darker) by adjusting the pencil pressure. This exercise requires an extraordinary sensitivity of touch, and when children achieve it, the result is genuinely lovely. This work can continue throughout a child’s entire time in the Children’s House. It can be relaxing and meditative, and when older children do it with great refinement, it naturally inspires younger children who observe them. Readiness and Timing Two key preparations precede the metal insets. Children should be able to trace the shapes of the geometry cabinet and the leaf shapes of the leaf cabinet using a stylus, and ideally they should be working with the movable alphabet. Timing matters. If we introduce the work too soon, before the hand is ready, it becomes too great a challenge rather than a satisfying one. The guide’s role is to observe carefully and to offer the presentation at the moment when it will be received with both readiness and joy. The metal insets are a landmark in the child’s journey toward written language. This layered preparation honors both the intelligence of the hand and the unhurried nature of true readiness. We invite you to come see the metal insets and the full breadth of our carefully prepared environment in person. Contact us to schedule a visit here in LakeCreek Montessori School or to learn more about life in our Children’s House.
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