Okay, that's an empirical question. I rather doubt it and think that the more adept teachers are more likely to apply there and to get through it. It's a filtering mechanism.
if montessori is adopted as part of a national or state curriculum then there would not be a filter anymore. and i do not think may people would fail the training. from what i saw it is rigorous and intensive, but it is not difficult. certainly not more difficult that traditional teacher education. the only teachers that would struggle would be lazy ones that enter the training with a preconceived idea of what teaching is about and find that idea challenged.
I doubt that you need any of that or it has any use for dealing with kids ages 3-6. Every granny and auntie knew how to do it since time immemorial. Just let them play, go out in the yard, chase the ants, dig some holes in the mud, run around, play with a ball. Eat and take a nap, look at picture books, have the teacher tell a story while the kids sit around her etc.
What matters is to have low-stress, motivated teachers with good personalities, empathy and intelligence. And similarly a filtered peer group. All the rest is window dressing.
no grandma or auntie can do that with 30 kids. seriously, you have to observe a montessori kindergarten in person to get what is going on there. and do some reading on how it works. the difference to regular kindergartens even with good teachers is massive.
you are underestimating how much effort it is to calm down a large group of kids. motivation alone is not enough for that. it does require training. if it didn't, then we would not require trained teachers to run a kindergarten group. it's not window dressing at all. and the montessori training and method is simply better and more effective than regular methods and training. and it doesn't need a filtered peer group either.
