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In 2004, the Centers for Disease Control and Prevention (CDC) published a set of early childhood developmental milestones to help parents "learn about their child’s developmental milestones and support their children’s development" (source). The milestones are one of several tools in the "Learn the Signs. Act Early." campaign to support child development and early identification of developmental concerns. In 2022, these milestones were revised with the support of the American Academy of Pediatrics (AAP) and a team of developmental experts and pediatricians. 

To access the milestones, visit 

This resource is related to the following ESPM knowledge-level competencies:

  • Core Knowledge (CK):
    • CK4: The range of typical infant/toddler physiological factors.
    • CK6: The sequences of development and the interrelationships among developmental areas/factors.
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