I absolutely hate the whole Montessori thing. I do believe that children learn through playing, I do believe that kids can do on their own.
However.
I do NOT believe that allowing a child to decide what they want for lunch then going and fixing it themselves is a good idea in any universe. I do NOT believe that children should be allowed to run amok and play at whatever they want whenever.
I have a lot of years in child care and I can honestly say that the Montessori schools that I have worked in have more behavior problem kids than anywhere else. When I would be trying to do circle time, where a lot of the learning about the environment comes in, there would be a few kids that didn't want to participate. SO they would go get toys out and play toys. They did not participate in the songs, the weather activities, the stories, exercise time, nothing. They just went to play and did nothing else. They were not ready for kindergarten when the time came either.
At play time they are like wild animals and do not have any sense of group activities or quiet time or art time etc...they just run from place to place playing with a toy then dropping it on the floor and running off to another area doing it again.
By the end of the day the classrooms are a mess and the kids are having aggressive behaviors because they have nothing to do. All the toys are everywhere and they can't find even the pieces to the puzzles or the crayons or paint to do some art.
I would never put the kids in this environment. I think that kids need some structure. They need structure so they will learn about boundaries and how to function within normal expectations.
When the kids at one child care center took the school kids to school on the van it would sometimes take these kids until 10am to calm down enough to do school work. I drove the van and often heard the teachers and other parents talking about these kids while I was dropping them off. I also called one day just to find out why someone had said something to my face. I wanted to know why.
The school person told me the information about time to calm down. They said it was across the board for all the child care centers of this particular business. It is a nation wide chain. They said that the kids would come in wound tight and almost vibrating. Over stimulated to the max.
Almost every one of the school kids would come back to the center that after noon with notes about how their behavior was that day, one the parents would have to sign.
When I had the school kids before school I would have them do an activity all together, like writing in their journal or playing a group game like Win, Lose, or Draw. Something they could all do and everyone was equal.
The days we did this they were well behaved and ready for school when they got there. I worked at this facility for a long time and would ask the principle if she would help me sort of keep track.
I know there are different kinds of places that use this style of curriculum but regardless. I want the kids to have more structure and be able to focus on one thing and learn.