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Four planes of development

From birth to adolescence, in four distinct stages

Maria Montessori observed that children pass through four developmental "planes", each with its own character, its own sensitivities, and its own materials designed to meet them.

Jump to age
Infant & Toddler
Plane 1
0-3 Years

Infant & Toddler

The Absorbent Mind

During this sensitive period, children absorb their environment effortlessly. Our materials support motor development, sensory exploration, and language acquisition.

The four planes of development

Maria Montessori divided childhood into four distinct six-year periods, each with its own needs and gifts.

0-3 Years

Infant & Toddler

The Absorbent Mind

3-6 Years

Primary / Casa

The Conscious Worker

6-9 Years

Lower Elementary

The Reasoning Mind

9-12 Years

Upper Elementary

The Social Being

Not sure which age range?

We'll help you match materials to the child in front of you

Our Montessori-trained specialists can look at your child's current interests, developmental moment, and any existing materials you own, then point you to what fits.

  • Free guidance
  • AMI-trained staff
  • Response within a day
A Montessori educator presenting materials to a child at a low table

AMI Approved

Authentic Montessori