The Planes of Development
Montessori Thrive • December 7, 2022

Maria Montessori based her entire educational philosophy on the idea that children developed through a series of four planes. Each of these planes is easy to recognize and has clear, defining characteristics. If we study and understand these stages, we can approach our interactions with children with a new perspective. 

Learning about the planes of development isn’t just for Montessori educators. Understanding your child’s development can help at home, too. 


The First Plane: birth-6 years


During this stage children absorb everything like sponges. They are, indeed, excellent examples if what Montessori called ‘The Absorbent Mind.’ This is a time in which we are able to utilize what Montessori called sensitive periods of learning. While each child is different, there are typical patterns that emerge in regards to brain development and general readiness to learn particular skills.


During the first three years of this plane, all learning is done outside of the child’s conscious mind. They learn by exploring their senses and interacting with their environment. During the second half of the plane, from about 3-6 years, children enter the conscious stage of learning. They learn by using their hands, and specialized materials in the Montessori classroom were developed with this consideration.


During this time, children have a wonderful sense of order. They are methodical and can appreciate the many steps involved in practical life lessons in their classrooms. The organization of the works on their classroom shelves is intentional, which appeals again to this sense of order.


The first plane is a time in which children proclaim, “I can do it myself”; it is a time of physical independence.


The Second Plane: 6-12 years


During the elementary years children begin to look outside themselves. They suddenly develop a strong desire to form peer groups. Previously, during the first plane, a child would be content to focus on their own work while sitting near others. In the second plane, a child is compelled to actually work with their friends. It is during this time that children are ready to learn about collaboration.


During the second plane there is a sudden and marked period of physical growth. This may be a contributing factor to the observation that many children of this age seem to lack an awareness of their body, often bumping into things and knocking things over. Children begin to lose their teeth around this time as well. Their sense of order and neatness tend to fade a bit during this plane.


Throughout the second plane, children’s imaginations are ignited. Since Montessori education is based in reality, we find ways to deliver real information to children through storytelling and other similar methods. For example, when teaching children about the beginnings of our universe, Montessori schools use what is called a Great Lesson. The first Great Lesson is a dramatic story, told to children with the use of props, experiments, and dramatics (think: a black balloon filled with glitter is popped to illustrate the Big Bang, with bits of paper in a dish of water used while talking about particles gathering together). This lesson is fascinating for children in the way it is presented, but gives them basic information about the solar system, states of matter, and other important concepts.


Children in the second plane have a voracious appetite for information, and are often drawn strongly to what we in Montessori call the cultural subjects: science, history, and geography. While we support their rapid language and mathematical growth during this time, we are also responsible for providing them with a variety of rich cultural lessons and experiences.


It is important to note that children develop a sense of moral justice at this time. They are very concerned with what is fair, and creating the rules to a new game is often as important (if not more so) than playing the actual game itself.


This is the period of time in which children are striving for intellectual independence.


The Third Plane: 12-18


The third plane of development encompasses the adolescent years. During the second plane, children become aware of social connections, but in the third plane they are critical. During this time children rely heavily on their relationships with their peers. They feel a strong desire to remain independent from adults, although they are not quite ready to do this entirely. It is our job to find ways that allow them to experiment with independence while also providing a safe structure in which they may do so.


Children in the third plane tend to require more sleep, and they sleep later than when they were younger. They long for authentic learning experiences, and Dr. Montessori imagined just that. Her ideas of Erdkinder (children of the earth) led her to contemplate a school setting that would support children’s development during this time. She imagined a farm school, in which children would work to keep the farm operational, but also contribute to planning and decision making while doing so. 


During the third plane children are refining their moral compass while developing a stronger sense of responsibility.


The Fourth Plane: 18-24



The final plane is a time in which young adults are striving for financial independence. They are often living away from home for the first time, and use this time to figure out where they fit into their society. Many make choices to further their education and/or explore career paths.


It is during the fourth plane that people begin to develop a truer sense of who they are as individuals.


Each plane of development should be mindfully nurtured. If a child is able to experience one developmental phase in a rich and carefully prepared environment, they are ready to fully take on the next phase when it is time.

By Elizabeth Horgan, Ph.D. October 23, 2025
Starting school is one of the biggest milestones in a child’s early life. For children entering Montessori school, this transition can come as early as the second year of life. The first few weeks in a new school or class are an exciting time of growth and adjustment that can also come with some big feelings (for parents and kids alike!). Having clear expectations and open conversation with your child can help the transition go smoothly for everyone. Here are some key things we recommend keeping in mind as your child starts school: Expect Big Feelings: Transitions are tricky for little ones, and getting out of the car and into the school building can be a big step for your child. Even the most confident kiddos may feel nervous when starting school. Tears, clinging to a parent, or reluctance to say goodbye can be tough to see, but are completely normal in the early weeks of the transition. As the parent, remember that your calmness helps reassure your child that all is well and they will be okay! Talk positively about school and share excitement about your child’s new experiences. Take Time to Learn New Routines: A consistent morning and drop-off routine can help your child adapt more quickly to going to school. Keep your mornings calm and predictable to avoid a rushed drop-off. When you get to school, think about incorporating a special routine you do with your child right before they get out of the car. Then make the drop off short and sweet! Even something as simple as a special phrase or prayer you say before your child exits the car can help them begin to know what to expect. Also, remember that at the beginning of the school year, children are learning new rhythms in the classroom as well. Where to put their things, how to follow the class schedule, and how to choose and complete their work are all big things for your little one. Be patient as your child adjusts. Keep an Open Mind about “Learning”: Remember that in Montessori school, much of the child’s daily work does not look like what you may expect from typical academics. Especially for the toddler class, children spend the majority of their time learning practical life skills, building social skills, practicing courtesy and manners, and engaging in their own self-care. You may not notice dramatic changes in your child’s knowledge or behavior in the first month. Things like putting shoes on and off, cleaning up after snack time, and preparing food are small steps that set the foundation for future learning. Give Social Connections Time to Grow: Some children may connect with their teacher and friends right away, while others may take some more time to join in and build connections. This is completely normal. As children become comfortable with their school community, they will build a sense of security, belonging, and purpose. Give your child time to find their place in the community, and soon they will thrive. Encouraging Independence Gives Children Confidence: Help your child take agency in their own school journey. Encourage them to choose their own clothes and assist them in learning to dress themselves. Include your child in packing their lunch or preparing their school items the night before. Remember why you chose Cross of Life Montessori: Adjustment takes time. But with patience, consistency, and support, the first few weeks at school can build the foundation for years of joy and growth ahead. Children pick up on your emotions and feelings. Even if you are feeling a little bit nervous (which is completely normal!) try to show your child that you are confident in the decision to send them to our school and say goodbye with a smile. They are in wonderful hands! Our teachers have decades of training and practice in helping children adapt to their new environment and are delighted to help your little one find their place. At Cross of Life Montessori, we’re here to walk alongside your family as you adjust to new rhythms, routines, and ways of learning. We’re so excited to participate in your child’s growth and learning! The first few weeks at a new school are a period of adjustment and trust-building as children settle into their new Montessori community. By knowing what to expect and supporting your child with calm routines and encouragement, you can help make the transition to school a positive experience for the whole family. We can’t wait to see your child in class!
By Elizabeth Horgan, PhD May 20, 2025
The Power of Routine for Young Children–Order, Predictability, and Independence