This third edition is fully updated to include new relevant research on topics such as pretend play and practical life, plus a new chapter on executive function. Other updates include research on organized classrooms, epigenetics, and sensory discrimination and intelligence. Current scientific research continues to provide astounding support for Dr. Montessori's major insights. Lillard presents the research concerning eight insights that are foundational to Montessori education and describes how each of these insights is applied in the Montessori classroom.