Montessori Today, Chapter 2: Overview of the Primary Years

Montessori’s first plane of development begins at birth and extends through the first full six years of life. It is a time of immense physical growth, monumental brain development, increased physical coordination, body awareness, and movement, development of independence, and tremendous growth of language. The young child works constantly to create himself, finding his way in a complex social structure, developing his will, establishing his independence, and making his thoughts and desires known. All of this intense development is done joyfully through play and sensorial exploration.