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
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.
Children at tables, parents interacting, Montessori school setting. Title: Lighthouse Parenting.
By Christine McClelland and Rebecca Lingo January 5, 2026
Lighthouse Parenting helps children navigate life with guidance and freedom, building the skills and confidence to grow into resilient, independent individuals.