Why We Use Mixed Age Groups in Montessori

When Maria Montessori began to develop the method of education that now bears her name, she changed much about what currently passed as children’s education.

Tables and chairs were shrunk to child-size, children were given real tasks to do, and observation (not testing) became the key to knowing how a child was progressing.

Another change that occurred was that children were grouped in multi-age classrooms, rather than having one age per class.

Generally, Montessori age groupings are as follows:

• Infant: birth – 18 months
• Toddler: 18 months – 3 years
• Preschool: 3-6 years
• Lower Elementary: 6-9 years
• Upper Elementary: 9-12 years
• Middle School: 12-14 years
• High School: 15-18 years

Because traditional schooling generally groups children of just one age together, mixed age groups is a striking difference between Montessori and traditional educational programs. There are pros and cons to the idea of mixed age groups, but I believe that the benefits definitely outweigh any possible negatives.

What Do Mixed Age Groups Bring to Montessori?

older_helping_younger1. Interaction: The mixed age group environment creates an atmosphere where children learn to help and be helped by other children, because they interact consistently with children whose age and abilities are varied. Children gain an appreciation for their achievement and the accomplishments of others, and are naturally challenged by the achievements of others.

2. Learning from Each Other: Older children learn to be patient and tolerant, and serve as role models and teachers for the younger children. When an older child teaches a younger one, it reinforces previously learned concepts and is actually an aid in complete mastery of concepts. Younger children learn about courtesy, manners, and conflict resolution by watching the older children in the class.

3. Work at Child’s Own Pace: Because teachers do not have to set the instruction pace by a whole group, each child is given the ability to learn at his or her own pace. This is a striking difference from traditional education, where everyone turns to page 33 of the book and stays there until every child understands the concept.

4. Community: By staying in a classroom for a three year period, children develop a strong sense of community and stability, with 2/3 of a class returning every year. This community aids the development of students as role models for one another.

5. Familiarity: Being in the same classroom year after year allows a teacher to truly learn each individual child’s learning abilities, style, and developmental level to better be able to set the learning agenda as well as build on strengths and work on weaknesses.

6. Homeschooling: Since homeschooling is naturally multi-aged, it’s a natural fit with the structure of Montessori. Siblings have a built-in support community for education and play, and benefit in the same ways that mixed age peers do as described above.

Is There a Downside?

1. Isolation: One major criticism for the Montessori mixed age group classroom is that children tend to work in isolation at their own tasks, with little social cooperation among students. In any classroom that allows children to work at their own pace, mixed age or not, this could potentially be the case.

2. Overburdened Older Students: Some people feel that a teacher should be the one to help a child when he or she needs help with a particular concept. There is always the possibility that older children are unreliable sources or ineffective teachers who may further confuse a peer. If older students are teaching or helping younger ones, they may be missing out on part of their own education.

3. Harder for Teachers: As well, there is a burden on the teacher to essentially teach three grades (or more) instead of one. This is definitely a challenge. Balancing it out, though, is the fact that the teacher understands clearly what the child needs to master to move to the next level.

Is It Worth It?

Once, early on in my Montessori teaching career, I asked my husband to be honest with me. “Do you think that Montessori is truly the best way to educate children?” I asked him. “Yes,” he said, “but the quality does depend on the person doing it.”

I feel similarly about the mixed-age group paradigm. Many teachers can juggle the different levels successfully. Some struggle with it. Sometimes older students sense the teacher’s weaknesses and capitalize on them, making it difficult for them to balance the needs of the classroom. I have seen this happen before.

If the classroom contains the materials needed for each age group, and the teacher knows how to blend and weave the lessons for each age group, the pros of mixed ages will likely be much greater than any cons.

As always, I love to know what you think. Are mixed-age groupings a good idea, and why or why not?

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10 Responses to “Why We Use Mixed Age Groups in Montessori”

  • Souzzann Zink said at September 14th, 2009 at 9:26 am :

    I think all the pros of mixed age grouping you list are important, but number 2 is essential. You can see this so clearly with children who spend their third year in a 3-6 classroom. Yes, they may get to some of the more advanced math and language materials that children with only two years miss, but the dramatic change is the leadership role they take. Some take younger children under their wing a lot and some just help out here and there, but they all seem to make huge leaps in their empathy and oral language skills.

    I think too many schools take on the “hard part” of Montessori (setting up the whole environment and getting teachers up to speed on all the materials and appropriate guidance) and miss out on the aspects of the program that make things easier. It may not seem that way at first, but having the mixed ages you describe, taking students only 5 days a week, and taking primarily students that will stay all 3 years makes the things so much easier on the adults over time. I do think you get the most benefit from mixed ages if you make a habit of encouraging younger ones to ask other children for help. “Who else could help you with that?” It is also gracious and a good model to thank children who go out of their way to help.

  • Lori Bourne said at September 14th, 2009 at 10:15 am :

    Thank you for your thoughtful reply, Souzzann! I have seen the benefits of mixed ages many times; you are right that the older children become leaders in a way that they couldn’t if they were in a class with all one age group.

    Thanks for stopping by!

  • Vidya Shankar said at September 17th, 2009 at 6:32 am :

    Dear Lori
    It is so wonderful that you have this wonderful site! I have just joined the AMI Elementary Diploma now, and I hope to take this knowledge to the rural poor of India through my organisation. I would like to share my experiences, and learn too, from your site. I hope we can connect and share information, material, and ideas on how this system is so important to prevent children from dropping out of school! The course is addicting and heady, I have just completed the foundation for 3 to 6, and am looking forward to the Elementary start up next week.
    Keep up the good work
    Thanks and regards
    Vidya Shankar

  • Lori Bourne said at September 17th, 2009 at 7:13 am :

    Hi, Vidya! So glad you found my site. The work you are doing sounds fantastic!

    Thanks for stopping by :)

  • Latoicha said at September 28th, 2009 at 10:01 am :

    Hello Lori:

    Thank you so much for posting this article.

    My son is in a Montessori school and has been there since age 3. He is in his 3rd year and is the oldest child in the class. However, he is having extreme difficulty in the class. He hates it actually.

    The class is extremely imbalanced as far as mixed-ageed grouping. There are primarly small 3 year olds in their first year of Montessori, a few 2nd years, and him as a 3rd year. He gets really irritated with the little kids and the teachers are not handling the class well.

    In addition, his class has had extreme teacher turn-over. He has had a total of 6 different assistance teachers in 3 years. Plus his lead teacher for 2 years has now taken an assistant role this year.

    I am wondering if the age imbalance and teacher turnover could be affecting his performance in class? Also he complains that he does not know any of the other teachers or students and all of his friends are gone.

    Please help!

  • Lori Bourne said at September 28th, 2009 at 10:16 am :

    Hi, Latoicha! That is definitely a tough situation. I’ll give you my thoughts.

    First, I find that it’s not productive to move a child to a new school after the school year has already started. There’s no guarantee he would like another school any better, and the kids at any new school have already bonded so he’d be the “new kid”.

    The key here is communication. Request a meeting with his teacher and the school director. Share your concerns in a non-threatening way. Ask them what they can do to help your son feel more comfortable in class.

    Some suggestions include: coming up with more challenging work for him to do, inviting kids from his class over to your house so he can get to know them better (even with a difference in ages, this should still be fun), and making sure that he is not always being asked to help the younger ones (some is okay but it shouldn’t be overdone).

    The teacher may also share with you some things he/she observes about your son’s behavior; if those are less than positive, try to be understanding just like you are expecting them to be understanding of your concerns.

    Also, talk with your son about the situation. Tell him that you are interested in helping him feel more comfortable in class. Let him know that you are talking with his teacher and ask him if there’s anything he wants you to tell them (although he should not be present at the conference).

    The situation sounds difficult for the teachers are well – between the high turnover rate and the imbalance of ages, they are probably having a difficult time too. So keep their perspective in mind when you talk to them.

    Keep talking, brainstorming, and working until you find a way to make it work. There will always be challenges for every kid at every school but generally you can work through it with patience and communication.

  • Roxana Foy said at January 26th, 2010 at 6:53 am :

    Hi, I have just been reading through your comments and would really appreciate your opinion. My son is a late Aug born child who is small for his age and quite shy to boot. He has been accepted to school in Sept but will be going in with children 1 year older than him and to boot he will be mixed with children upto 2 years older than him. I am concerned that this environment might be too much for him as he will be the youngest and smallest child in the room with a personality that does not help him in the slightest. Should I be concerned or am I just being an over protective mother ?

  • Lori Bourne said at January 26th, 2010 at 8:21 am :

    Hi, Roxana! That’s one of those questions that you can’t really know the answer to until he starts school and you see him in the environment with the other children. However, I don’t think being the youngest and smallest will hurt him. There’s usually a wide range of ages (within the year span) and sizes in any classroom.

    What you can do is be proactive about helping him make friends, like inviting other kids over to your house, etc. That will ensure that he gets to know other kids and that will help a lot.

  • Maryhelen Campa said at February 10th, 2010 at 10:57 pm :

    Hi Lori,
    Great site, thank you for your time and work. I have a parent who is convinced that the children in the 3-6 year old class compare and keep track of where they stand in comparison to their peers. “I’m older than Susie but she gets to do that lesson”. I’ve tried everything I know to tell her that this is not the norm; that the 3 year age range works. Any recommended reading other than the very difficult standard Montessori ‘textbooks’, that I could recommend to her?

  • Lori Bourne said at February 11th, 2010 at 5:20 pm :

    Hi, Maryhelen! Is there a way she could observe your classroom for a morning? That usually does more for a parents’ understanding of Montessori than reading a book.

    Some great sources for Montessori info are back issues of Montessori Life magazine, and the book “Montessori Madness” by Trevor Eisler. And you can forward her a link to this post, too.

    It sounds like she needs more info into the “why” of the mixed age group, so that she understands it better. Also, does she know that no work is truly off-limits to any age in 3-6, it’s just “how” they do it that differs?

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