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Week to Week

Developmental Frameworks

281 milestones across 5 trusted frameworks — every activity is mapped to real developmental goals.

CDC Developmental Milestones

Centers for Disease Control and Prevention

159 milestones

Evidence-based developmental milestones for children ages 2 months through 5 years, organized by social/emotional, language/communication, cognitive, and movement/physical development domains. Milestones are set at ages by which 75% or more of children would be expected to exhibit them.

4 domainsAges 2mo 6yrView source →

ASQ-3 Developmental Domains

Ages and Stages Questionnaires, Third Edition (ASQ-3)

62 milestones

The ASQ-3 is a widely-used developmental screening tool organized into 5 domains. Used by pediatricians to track development at regular intervals. Note: We align activity categories to ASQ domains — we are NOT administering the ASQ.

5 domainsAges 2mo 5yr 6moView source →

WHO Motor Development Standards

World Health Organization Multicentre Growth Reference Study

6 milestones

WHO standards for gross motor milestones based on a global study of healthy children in 6 countries. Provides windows of achievement for fundamental motor milestones from birth to 2 years.

1 domainsAges 0mo 2yrView source →

Montessori Sensitive Periods

Maria Montessori / Association Montessori Internationale (AMI)

24 milestones

Montessori identified 'sensitive periods' — windows of time when children are particularly receptive to acquiring certain skills or knowledge. Activities aligned with sensitive periods leverage natural motivation.

6 domainsAges 0mo 6yrView source →

Reggio Emilia Approach

Loris Malaguzzi / Reggio Emilia Municipal Schools

30 milestones

The Reggio Emilia approach views children as capable, resourceful protagonists of their own learning. Originating in Reggio Emilia, Italy after WWII, this philosophy emphasizes learning through the 'hundred languages' of expression, collaborative investigation, the environment as a third teacher, and documentation of learning processes.

5 domainsAges 0mo 6yrView source →

Compare Frameworks Side by Side

See how CDC, ASQ-3, WHO, and Montessori describe development at your child's age — all in one view.

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