From the article:
"All 24 public study Montessori schools met basic Montessori criteria (SI Appendix, section 3A), but implementation varied widely. "
"The final implementation criteria for school inclusion were thus:
• At least 66% of the lead Primary classroom teachers are trained by one of the two most prominent Montessori
teacher training organizations, the Association Montessori Internationale (AMI) or the American Montessori
Society (AMS). One school was excluded on this basis.
• No more than two adults, the trained teacher and a non-teaching assistant, in the classroom on a regular basis.
No school was excluded on this basis.
• Classrooms are mixed-age, with at least 18 children ranging from 3 to 6 years old. Five schools did not mix
ages so were excluded.
• At least a 2-hour uninterrupted free choice period every day. Five schools were excluded on this basis.
• Each classroom has at least 80% of the complete set of roughly 150 Montessori Primary materials, and fewer
than 5% of the materials available to children in the classroom are not Montessori materials. No school was
excluded for failing to meet this criterion."
So seems like the criteria for this research is fairly good.
In general though it's hard to tell if a school is Montessori or not. The method is not trademarked and anyone can claim to be a Montessori school ,or Montessori inspired etc...
There are two organizations that certify - AMI, which was created by Maria Montessori's daughter and functions mostly in Europe, and AMS which is an American organization founded by people inspired by the Montessori method.
AMI is stricter while AMS is more modern, but most places that identify as Montessori is neither.
I would say the best way to identify if a school is Montessori is first if they have mixed-age classrooms, the standard is a 3 year class (so 1-3, 4-6, 7-9...).
If all the kids in a class are in the same age, it's not Montessori.
"The final implementation criteria for school inclusion were thus:
• At least 66% of the lead Primary classroom teachers are trained by one of the two most prominent Montessori teacher training organizations, the Association Montessori Internationale (AMI) or the American Montessori Society (AMS). One school was excluded on this basis.
• No more than two adults, the trained teacher and a non-teaching assistant, in the classroom on a regular basis. No school was excluded on this basis.
• Classrooms are mixed-age, with at least 18 children ranging from 3 to 6 years old. Five schools did not mix ages so were excluded.
• At least a 2-hour uninterrupted free choice period every day. Five schools were excluded on this basis.
• Each classroom has at least 80% of the complete set of roughly 150 Montessori Primary materials, and fewer than 5% of the materials available to children in the classroom are not Montessori materials. No school was excluded for failing to meet this criterion."
So seems like the criteria for this research is fairly good.
In general though it's hard to tell if a school is Montessori or not. The method is not trademarked and anyone can claim to be a Montessori school ,or Montessori inspired etc...
There are two organizations that certify - AMI, which was created by Maria Montessori's daughter and functions mostly in Europe, and AMS which is an American organization founded by people inspired by the Montessori method.
AMI is stricter while AMS is more modern, but most places that identify as Montessori is neither.
I would say the best way to identify if a school is Montessori is first if they have mixed-age classrooms, the standard is a 3 year class (so 1-3, 4-6, 7-9...).
If all the kids in a class are in the same age, it's not Montessori.
Second, for preschool, you expect the class to be very organized with intermittent shelves and work areas, and very neat (no mountain of toys etc...) - https://www.google.com/search?udm=2&q=montessori+classroom