Inside the Montessori community and beyond, multi-age classrooms are a hot topic for parents, teachers, and school administrators. Multi-age class, combination class, double grade, split-grade class, mixed-age class, ungraded class, vertically-grouped class… Are we all talking about the same thing? Angeline Stoll Lillard, in her authoritative research review Montessori: The Science Behind the Genius, describes Continue Reading