It also means you aren't likely to find the whole group learning the same thing at the same time.
In a Montessori classroom, this means you won't find a teacher hurrying a child through an assignment or putting time constraints on their exploration of a concept. It also means you aren't likely to find the whole group learning the same thing at the same time. Instead, you're more likely to see small groups of children working on several different activities simultaneously. And, rather than standing up in front of the room directing the class, you're more likely to find the teacher going from group to group of students, answering their questions and helping them along in their exploration.