Mixed-age groups can feel like a family. Older children often want to #lead, and younger children often want to copy. But conflicts can pop up when children feel:
Sometimes older children become bossy instead of helpful. Sometimes, younger children touch #materials before they are ready. And sometimes, both children just want the same thing at the same time.
Montessori classrooms are designed to help older children mentor, and younger children #learn, but we still need to teach children how to do this with respect. 
Montessori works best when the classroom runs on two big ideas:
In a calm Montessori room, children should not have to “fight” for space, attention, or materials. The environment helps children feel safe, capable, and included.
A helpful training that focuses on mixed-age success is Montessori Essentials: Mixed-Age Mastery. It teaches strategies for mixed-age instruction and support for every child.
Montessori #teachers don’t wait for a big problem. They teach “Grace and Courtesy” lessons #early and often.
Here are simple skills to practice during calm moments:
Try short role- #play lessons. Keep them fun, fast, and repeat them many times. This builds #Montessori social skills in a way children can actually use.
For deeper support with Grace, Courtesy, and Peace Education, a great course is Raising Peaceful Learners: The Montessori Advantage. It covers Grace and Courtesy and how Peace Education supports conflict resolution.
Many conflicts happen because the room setup makes conflict easy. A Montessori “prepared environment” makes peaceful work easy instead.
Use these simple checks:
When your room is calm and organized, children don’t need to control each other.
If you want step-by-step help with room design, try The Prepared Environment: Montessori Class Design. It explains how the environment supports independence and access for all children.
Montessori teachers try not to “be the judge.” Instead, they coach children to solve problems respectfully.
Try this simple 4-step script:
If an older child is being rough or mean, step in quickly for #safety. But after safety is handled, return to teaching, not blaming.
This is #PeaceEducation in action—children learn that problems can be solved without shouting or pushing.
Older children love to feel important. That can be a strength—if we guide it.
Teach older children the “helper rules”:
You can also give older children real leadership jobs that do not control other kids, like:

This helps older children feel proud without pushing others around.
Some children need a safe place to calm down before they can solve a problem. A Peace Corner gives them that space.
A helpful #free resource is Peace Corner. It’s designed to support self-regulation, emotional #awareness, and conflict resolution in a calm, child- #centered way.
Simple Peace Corner items can include:
Teach Peace Corner use when children are calm, not only when they are upset.
Mixed-age harmony grows when children feel they belong together.
Try routines like:
Remember: Montessori mixed-age groups work best when older children learn leadership and younger children learn confidence—side by side.
Repeat conflicts are a clue. Ask yourself:
Even one small change can reduce conflict fast.
For more Montessori-specific ideas on peace and social harmony, you can also share this ChildCareEd article with your team: Peace Education and Grace and Courtesy in Montessori Education.
Follow ChildCareEd on Pinterest for practical classroom ideas you can use right away: https://www.pinterest.com/ChildCareEd/ (and share your favorite pins with your teaching team!).