- Baby and Toddler Milestones: A video from the Albert Einstein College of Medicine
- CDC's Milestones in Action: Offers a photo and video library of developmental milestones in action.
- CDC's Developmental Milestones - Skills such as taking a first step, smiling for the first time, and waving “bye bye” are called developmental milestones. Children reach milestones in how they play, learn, speak, act, and move (crawling, walking, etc.).
- 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.
- Healthy Children.Org - Your baby will give you the most important information—how he or she likes to be treated, talked to, held, and comforted. This section address the most common questions and concerns that arise during the first months of life.
- The National Institute on Deafness and Other Communication Disorders provides background information on speech and language development from birth to 5 years. Interactive checklists for different ages are available.
- Zero To Three works to ensure that babies and toddlers benefit from the early connections that are critical to their well-being and development. Explore resources for parents, professionals and policymakers.
- NORD - National Organization for Rare Disorders
- ECTA - Early Childhood Research & Reference Portal
- The Individuals with Disabilities Education Act (IDEA) is a law that makes available a free appropriate public education to eligible children with disabilities throughout the nation and ensures special education and related services to those children. The IDEA governs how states and public agencies provide early intervention, special education, and related services. Explore this site to learn more about IDEA, Part C Regulations for Early Intervention, Parents Rights and more.