Improving Systems, Practices, and Outcomes

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Child Development Resources

Below are selected resources helpful in understanding typical child development. If you have additional resources you use for this work, please share them with us! Contact Cornelia Taylor.

ASQ-SE Social-Emotional Development Guide

This guide offers age-appropriate milestones in social-emotional development for children from 2 months to 60 months.

Baby and Toddler Milestones

In this public service video for parents, Lisa Shulman, M.D., uses video of babies and toddlers to show the communication milestones expected in typically developing children. She also discusses what parents should do if they suspect their child is developmentally delayed.

American Academy of Pediatrics

This website offers health and developmental milestones for different stages, and developmental signs which may need further evaluation.

Centers for Disease Control: Developmental Milestones

This website provides information on developmental milestones for children from 3 months to 5 years of age and offers developmental warning signs for each age group.The site also offers interactive tools for users to specify certain ages, select areas of development, and examine expected changes in milestones overtime.

Colorado age-anchoring resources

These materials, developed by Larimer County (Colorado), provide examples of age-expected development according to the three child outcome areas. They cover child skills and functioning from birth to 36 months.

First Signs

First Signs is a public awareness and training program addressing early detection and intervention of autism and other developmental disorders. This site provides information on monitoring development, typical milestones, video clips of children with ASD, and tips on sharing concerns.

Illinois Child Development Modules: Understanding Young Children's Development

These narrated modules were developed by training personnel in Illinois based on content developed by the University of Connecticut Center for Excellence in Developmental Disabilities. The modules correspond to child outcome areas and are focused on identifying age-appropriate skills among children zero to three:

Indiana Standards Tool for Alternate Reporting of Kindergarten Readiness (ISTAR-KR) Performance Level Descriptors

This document was developed by Indiana’s Department of Education to show how observed skills and behaviors addressed by the state’s early childhood assessment relate to the three OSEP child outcomes.

Infant and Toddler Connection of Virginia

This manual was developed to provide a resource to assist practitioners in determining how a child is functioning in relation to their same aged peers in the three OSEP outcome areas. The manual reviews typical child development among infants and toddlers ages birth to three.The NC Department of Public Instruction (DPI) has a number of publications available to help explain the importance of child outcomes, as well as the process and requirements.

Maryland's Part C Age-Anchored Early Learning Guidelines

Milestones in Action

This is a free image library that features photos and videos of children demonstrating developmental milestones from 2 months to 5 years of age. This tool was created to help parents, early care and education providers, and healthcare providers identify developmental milestones in children and may be used:

  • to support information given during trainings
  • to support observations and conversations within team about age-appropriate milestones

The National Institute on Deafness and Other Communication Disorders

This site provides background information on speech and language development from birth to 5 years. Interactive checklists for different ages are available.

North Dakota DPI Age Expectation Developmental Milestones

This document was developed by North Dakota's Department of Public Instruction and documents age-expected functioning according to the three child outcomes. They also have a three-page milestones quick reference.

Parenting Counts Developmental Timeline

This online resource from Talaris Institute provides research-based information about children's developmental milestones from birth to age 5.


An online resource for information and activities related to infant and child development.

University of Connecticut Center for Excellence in Developmental Disabilities

An online training module on social-emotional development in infants and toddlers related to the three OSEP child outcomes.

Zero to Three

Brain development, challenging behaviors, mental health topics, play, social development, temperament, and more. Each section has interactive tools, parent handouts, tip sheets, FAQs, articles, PowerPoint slides, and other resources.