150 Years: The Planes of Development

Meagan Ledendecker • June 7, 2021
Two elementary aged children at a table with test tubes in a rack

This article is part of a series that we have shared throughout the 2020-2021 school year to celebrate the 150th birthday of Dr. Maria Montessori and to reflect on the past, present, and future of Montessori education. This marks our final post of the year.

 

“I have found that in his development, the child passes through certain phases, each of which has its own particular needs. The characteristics of each are so different that the passages from one phase to another have been described by certain psychologists as ‘rebirths’.” -Dr. Maria Montessori

 

Throughout her years of observing children across a wide variety of settings, Dr. Maria Montessori noticed certain undeniable patterns in development. She recognized that there are many variances among individuals but stated that there were certain traits that could generally be relied upon as children grow and age. She believed that these traits and characteristics could be used not only as markers to determine a child’s developmental phase, but also as a guide for the adults who serve the child.

 

As Montessori educators, we still use her scientific findings in our work today. Dr. Montessori recognized that childhood development is divided into four main phases, or planes. Each plane builds upon what was learned in the previous stages, and each plane has both an active and passive phase. By fully understanding the developmental needs of a child—wherever they happen to be on this continuum—we are better able to create an environment that will be optimal to support their further development.

 

There is so much to say about Montessori’s planes of development, however we will keep it brief and highlight the main points. Just as we utilize this information in our learning environments, we encourage you, parents and caregivers, to consider how your child’s developmental traits might inform your own decisions at home. Is there anything you’re already doing that supports their growth? Is there anything new you might try?

 

 

The First Plane of Development

Newborn to Age 6

During the first plane of development, children learn primarily through experiences they have with their environment. The personal growth during this period is unlike anything we see for the rest of our lives. This is a time of tremendous physical growth, and is also when our children are developing their personality. Some of the most important traits to be aware of during this time:

 

●     The need to feel safe and secure

●     A desire for physical autonomy

●     Exploration and refinement of the senses

●     Development of gross and fine motor skills

●     Desire to work independently or beside peers (as opposed to with them)

●     Concrete thinking

●     A tendency toward neatness and order

 

From birth to about age six, the child’s motto is essentially: “Help me to do it myself.”

 

 

The Second Plane of Development

Ages 6 to 12

Around age six, there is a definitive shift in the child. There are a series of physical growth spurts, as well as an insatiable need for knowledge about the world and universe. The child’s world begins to expand beyond the narrow perimeters of themselves. This means they are more social, but also curious about everything beyond what they already know. Keep the following characteristics in mind:

 

●     This is a time of big imaginations!

●     The child’s thinking moves from concrete to abstract.

●     The cultural subjects (science, geography, and history) are of great interest.

●     Children often prefer BIG work at this age.

●     They crave social interactions but are still learning how to navigate them appropriately.

●     They aren’t always aware of their growing limbs and often fall/knock things over.

●     Neatness and order are not important, and often forgotten.

●     Justice and fairness become critically important.

 

At this age children just want to devour all the information they possibly can. It is our job to help them learn to “think for themselves”.



The Third Plane of Development

Ages 12 to 18

The third plane is a magical time. Adolescents find themselves learning who they are as individuals. Although we change continuously throughout our lives, who we are at our core and what drives us is usually anchored in the discoveries we make during our teen years. The onset of puberty brings enormous physical and emotional changes, and the variability between peers during the first half of this plane is obvious. Important points to remember:

 

●     Teens are thinking about their futures.

●     They need nurturing and emotional support much like first plane children.

●     Having information about puberty will help them as they experience it.

●     They rely heavily on peers, but still need adult support (even as they seem to reject it).

●     Emotions will fluctuate dramatically.

●     Adolescents need respect.

●     Physical work is often more important than intellectual pursuits.

 

Adolescence can be a challenging time for teens and the adults in their lives. There is a constant pushing away and pulling toward one another, and as adults we can work to stay consistent and support their growing independence. This is also an important time to remember that teens are developing their sense of who they are and what they will become. Their ideas for their future may look different from what we may have envisioned for them, and that’s okay!

 

 

The Fourth Plane of Development

Ages 18 to 24

Montessori considered ages 18 to 24 the final stage of development into maturity! Perhaps you are still in this plane yourself, or not that far out of it. Perhaps you have children approaching this plane. Late adolescence into early adulthood is the bridge that connects our childhood selves to the rest of our adult lives. The rapid growth and learning that goes on during this time period is critical to supporting our future selves.

 

People in the fourth plane of development are striving toward full independence. This may mean moral independence, financial independence, and emotional independence. At this age we tend to evaluate our own personal place in society. We think about how we will contribute to the greater good, and what our path will look like moving forward. We develop personal interests, start our careers, and sometimes even begin families of our own.

 


Dr. Maria Montessori stopped writing about human development at the fourth plane. One has to wonder, what would it look like if she had continued? How might human development be classified and defined as it moves through the adult years? How could Montessori philosophy be applied to adult life?

 

Want to learn more? Take a look at any one of these helpful resources.

Association Montessori International - The Child's Development

The Four Planes of Development by Camillo Grazzini

Association Montessori Internationale - Planes of Development Quotes

By Meagan Ledendecker February 23, 2026
One of the quieter, less visible practices in a Montessori elementary classroom is the Child-Guide conference. You may never see it listed on a schedule or mentioned in a weekly update, yet it plays a profound role in children’s experience at school. Relationship Comes First The primary purpose of these conferences is to establish, maintain, and strengthen the relationship between the adult and each child. This focus shifts the dynamic from a teacher looking for faults or scolding about unfinished work. Rather, it’s a collegial conversation that enables children to take an active and engaged role in their own education. These connective conversations are grounded in relationship-building because when children feel emotionally safe and genuinely respected, they are far more willing to reflect, stretch themselves, and take responsibility for their growth. Every Child, as Often as They Need Montessori Guides aim to meet regularly with every child, but what “regularly” looks like can vary based on individual needs. Some children benefit from a longer, more formal conference every few weeks. Others need brief, frequent check-ins, sometimes lasting only a minute or two. These short moments might look like a quick conversation at the beginning of the morning, a gentle pause beside a table, or a quiet walk across the room together. The length of the meeting is not what matters. What is important is the message it sends: “I see you. I know your work. I care about how this is going for you.” What Happens in a Child-Guide Conference? While conferences vary based on each individual and the moment, they often include: The child bringing their learning journal or work (finished and unfinished) The guide bringing observational records A shared look at what has been accomplished Gentle reflection on what still feels unfinished Planning for what might come next Scheduling new lessons or presentations Support with larger projects: breaking them into steps, mapping timelines, imagining the finished product This collaborative time also provides an opportunity to experiment with new strategies (“Would you like to try creating a prioritized list?”), celebrate successes (“You worked so hard on your presentation! How did it feel to share your work?”), and reflect upon challenges (“It seems like you’ve been feeling a bit stuck in your research project. Tell me more about what is going on.”). Learning to Define “Finished” One of the most freeing lessons children learn in Montessori is that not every piece of work must be finished to an adult’s standard. Sometimes children accomplish exactly what they set out to do, and continuing would add nothing meaningful. Other times, interest has naturally ended, and letting go is healthy. This is not about lowering expectations. It is about honoring children’s internal sense of completion and learning when to release what no longer serves a purpose. Trusting Children’s Self-Assessment A cornerstone of these conferences is trust. Guides listen carefully to how children assess their own work and articulate their goals. When an adult truly accepts children’s self-assessment, something powerful happens: children begin to see themselves as capable, thoughtful, and worthy of being taken seriously. Children often receive more from the tone and sentiment of these meetings than from the actual content discussed. The Whole Child Matters Because Montessori education is concerned with the whole child, conferences may naturally move beyond academics. A Guide might gently offer support with social dynamics or ask about recent struggles during outdoor time. These moments provide a safe space for children to reflect on their own social, emotional, and physical development, and to recognize that there is a network of support. When Relationships Need Repair Even in the most thoughtful classrooms, relationships can become strained. What matters is how adults respond. It is never too late for a Guide to sit with a child and say, honestly: “I’ve been thinking about how we’ve been interacting recently, and I’d love to brainstorm with you about what I could do differently.” When an adult takes responsibility, without demanding the child do the same, something shifts. Trust begins to rebuild. Real dialogue becomes possible. Children learn from this modeling. In time, after they feel safe, they often step forward to take responsibility themselves. What Children Are Really Learning Through these quiet, intentional meetings, children learn that:  their thoughts and feelings matter, adults can be trusted, mistakes are part of growth, reflection leads to independence, and relationships can be repaired. And while these conferences may happen quietly in a corner of the classroom, their impact echoes far beyond it. This is true preparation for life. To learn more about the long-term benefits of Montessori, visit us here in Lenox, MA!
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