i get your point, however i am not sure if disruptive students are actually a problem in a montessori class. i'd really like to see some actual reports from the field here.

since in a montessori class each student does their own thing, a disruptive student can do far less damage than in a traditional class.

in a traditional class the disruptive student takes away attention of the teacher from the class. and class learning is indeed disrupted while that happens. in a montessori class, the teacher can take care of the disruptive student individually without disrupting attention from other students. oh, sure, it may happen that a a teacher-student interaction is disrupted once in a while, but in that case the teacher can tell that student to work on something else while they deal with the problem child. further, if we assume that most students are disruptive because they seek attention, i expect that such students will actually be much less disruptive than in a traditional class.

also, one of the key points of montessori is to teach children individually to work with their material on their own.

this goes so far that in some schools the beginning of the year is split in stages. on the first day only a handful of children are coming to school. the smaller group makes it easier to get each child to calm down and get used to the classroom setting. once they are fine, the next batch of children enters (the next day or a few days later). the first group is already quiet at work, and so the teacher now can deal with the next group, and so on until all children are present.

this not only allows the teacher to adjust their ways for each child individually, but doing that is the very point. therefore a montessori teacher has much more powerful tools at their disposal to deal with problem children and help them integrate into the classroom.

chances are that a child that is disruptive in a traditional class simply won't behave like that in a montessori class.