This text presents 12 chapters on the development of coordinated systems of service delivery to infants and toddlers who have disabilities or are at risk for disabilities and their families, as mandated by Part H of the Individuals with Disabilities Education Act (IDEA). An introductory chapter by Lawrence J. Johnson presents a general overview of issues. The main chapters include: (1) "Family Involvement in Early Intervention: The Evolution of Family-Centered Service" (Paula J. Beckman et al.); (2) "Model Programs for Infants and Toddlers with Disabilities and Their Families" (Vicki D. Stayton and Merle B. Karnes); (3) "Integrated Program Activities for Young Children" (Patricia L. Hutinger); (4) "The Transdisciplinary Team: A Model for Family-Centered Early Intervention" (Mary J. McGonigel et al.); (5) "Administrative Challenges in Early Intervention" (Corinne W. Garland and Toni W. Linder); (6) "Defining the Infancy Specialization in Early Childhood Special Education" (Eva K. Thorp and Jeanette A. McCollum); (7) "Program Evaluation: The Key to Quality Programming" (Lawrence J. Johnson and M. J. LaMontagne); (8) "Continuing Positive Changes through Implementation of IDEA" (Pascal L. Trohanis); (9) "State Diversity and Policy Implementation: Infants and Toddlers" (James J. Gallagher et al.); (10) "Early Intervention Public Policy: Past, Present, and Future" (Barbara J. Smith and Patti McKenna); (11) "Social Policy and Family Autonomy" (Patricia A. Place); and (12) "Early Intervention: The Collaborative Challenge" (R. J. Gallagher et al.). (Each paper contains references.) (DB)