The Capstone Years
Didem Bugay • February 5, 2024

There are key times in children’s lives when they can consolidate emerging parts of themselves before moving into a new area of growth and change. Three significant times of change for young people are around age six, around age twelve, and around age fifteen, the Kindergarten, 6th-grade, and high school freshman years. Both biology and Montessori theory offer insight into why these are significant times in children’s lives.  


Montessori’s Planes of Development


Dr. Maria Montessori believed that children’s work is to construct the adults they will become. This is really important work! Adults can support children’s self-construction, but not do it for them. Children can accomplish self-construction through their activities and interactions with the environment. 


Dr. Montessori’s observations of this self-construction led her to develop a theory of four planes of development. When looking at children’s development from a scientist’s point of view, Dr. Montessori found that development did not occur steadily but rather occurred in phases or planes. Dr. Montessori considered that the change in children, as they moved from one plane to another, was so profound that it resembled a rebirth.


Each plane or phase of development lasts for approximately six years: infancy (0 to 6), childhood (6 to 12), adolescence (12 to 18), and adulthood (18 to 24). The turning point around age six is when children move from infancy into childhood, around age twelve they move from childhood into adolescence, and around fifteen young adults feel more settled, stable, and confident in themselves.


Biological Changes


Biologically, considerable hormonal changes are happening during these two transition times in children’s lives. While our society generally recognizes the biological shifts as young people move into adolescence, we are less well-versed about what happens in our six-year-olds. 


It doesn’t take much, though, to realize change is afoot! Think about what we see in terms of dramatic physical changes around age six: their teeth start to fall out, their hair gets coarser, they lose that baby-soft skin, and they become leaner and lanky. Similarly, our twelve-year-olds are on the brink of adolescence, another period of dramatic physical growth and change. Our fifteen-year-olds are learning who they are as individuals and crave social independence.  


However, there can be a gap between these physical signs of maturity and the cognitive and emotional development happening for our six-year-olds and twelve-year-olds. Often children at these ages are moved too quickly into an environment that doesn’t meet their needs and doesn’t honor the internal growth that still needs to occur. When this happens, they lose the environmental stability that allows them to develop a deeper sense of self-confidence and to truly consolidate the intellectual and emotional skills they have been developing over the previous years.


Capstone Years at Wheaton Montessori School


We recognize the importance of these transitional years and intentionally design our classrooms to support our students during this time. The six-year-olds and twelve-year-olds are the oldest in our Primary (Preschool and Kindergarten) classroom and Upper Elementary classroom respectively and fifteen-year-old freshmen are the oldest, by design, in our Adolescent Community. They know the routines and expectations, they have secure relationships, and they get to help others who are newer to the classroom communities. 


Because they aren’t trying to assimilate into a new environment, our six-, twelve-, and fifteen-year-olds can serve as leaders for their mixed-age classrooms. They can focus on challenging work and big personal achievements. By being with their younger classmates, they can see where they have grown up and how they got to where they are now. 


These are the capstone years, the final piece to complete the critical building-up that has been happening during the previous formative years. The level of mastery allows our six-year-old, twelve-year-old, and fifteen-year-old leaders to integrate their social, emotional, and intellectual selves. 


During these capstone years, children gain a sense of self-confidence and self-satisfaction from successfully navigating the bigger projects and bigger conversations. The younger learners in the classroom communities are working toward these capstone capabilities and admire the oldests’ social, emotional, and academic strengths. All of these realizations are within a community of adults and peers who have shared their learning experiences over several years.


By having the opportunity to integrate their learning in a safe, stable, and secure environment, our young learners can do their important work of self-construction. 


Wheaton Montessori School’s carefully designed programs meet each child’s age-specific needs and follow the stages of development identified by Dr. Maria Montessori which research keeps confirming. Completing each program’s cycle is ideal for the development of the person. 


It is never too early to start planning for the next stage of education for your family. Schedule a school tour by clicking this link so you can observe the significance of these capstone years at Wheaton Montessori School.  


Current families are invited to schedule their classroom observation by clicking the green buttons below. See how these capstone years are displayed among our students and you are always welcome to level up!


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
Allowance and Accountability
By Tracy Fortun, Lower Elementary Teacher
 October 13, 2025
Discover practical allowance strategies that teach kids responsibility, money management, and the value of work. Learn how to tie chores and rewards to real-life lessons that stick.”
By Tracy Fortun October 7, 2025
Where it All Began: The Story of the Universe In the first Great Lesson, the Story of the Universe, students were introduced to the concept that as the universe formed, every particle was given a set of laws to follow. As each speck of matter set about following its laws, they gathered together into groups and settled down into one of three states: the solid, the liquid, and the gaseous. The Earth gradually cooled into a somewhat spherical form with a surface marked by lots of ridges and hollows. The ridges are the mountains, and the rains filled in the hollows to make the seas. The Coming of Life: A New Beginning The Story of the Coming of Life picks up here, with the sun looking down at the Earth and noticing some trouble going on. As the rains fell, they mixed with gases from the air, which introduced a lot of salt into the seawater. Additionally, the rocks were being battered by the sea and breaking off, adding more minerals and salts to the water. Dr. Montessori anthropomorphizes the sun, the air, the water, and the mountains very entertainingly as they each blame one another for all the trouble. The Timeline of Life: Evolution Unfolds Then, an answer appears in the form of a little “blob of jelly” which arrives in the sea. This bit of jelly is given a special set of directives that none of the others have: the ability to eat, grow, and make more of itself. Gradually, the blob of jelly divides into multitudes of creatures who set about eating the minerals from the sea and developing into increasingly complex organisms. Some of these animals ate one another, while others used the minerals in the sea and the light from the sun to make their own food. Our Timeline of Life accompanies the story. Dr. Montessori purposely does not try to show every type of animal that has ever existed on this timeline. She selects just a few examples to show the progression of life from the single-celled organisms and trilobites to the first animal with an internal skeleton (the fish) to the first animal to try out life on the land (amphibians – also the first voice!) to the reptiles, who worked out a way to live independently of the water by cultivating scaly dry skins and eggs with shells. The children hear about how the reptiles grew in size and in number to become the masters of the earth, while some enterprising small creatures learned to survive on the fringes, raiding the reptiles’ nests and developing warm body coverings to survive in the colder temperatures that the reptiles couldn’t tolerate. These birds and mammals also learned to care for their eggs and babies. These adaptations helped them to thrive while those giant reptiles…well, we don’t have them around anymore, do we? Wonder, Curiosity, and Ongoing Discovery  The childr en are fascinated by this story, which sets up for them the basic laws that govern all living things, providing a framework for the biology work they will undertake in the elementary classrooms at Wheaton Montessori School. It also serves as an epic tale of how the earth was prepared for the coming of one very special animal that was unlike any other…us! From here, the students will pick up on any number of details to investigate further. Already, I’ve had first graders studying the fossils of trilobites and crinoids (sea lilies) and others embarking on dinosaur research. The key concepts that were introduced in this story will be refined throughout their time in the Elementary community by lessons on the parts of the plants and their functions, the classification of plants and animals, and the systems of an animal’s body. And these ideas are further integrated as they apply them in their research projects about plants, animals, fossils, rocks, minerals, and limestone, oceans, rivers, and mountain.