Noting that teachers and caregivers need an understanding of the fundamentals of developmentally appropriate practices in order to implement programs that meet the needs of young children, this revised guide serves as a practical tool for staff trainers and supervisors in early childhood education. The guide addresses five specific groups of early childhood professionals: caregivers of infants in center-based settings; caregivers of toddlers in center-based settings; teachers of preschoolers in center-based settings; staff working with school-age children in center-based settings; and providers who care for infants, toddlers, preschoolers, and school-age children in family child care homes. Chapter one of the guide addresses standards of quality, curriculum, parent involvement, and provides resources for establishing a firm foundation. Chapters two through five are devoted to infants, toddlers, preschoolers, and school age children, respectively. Chapter six addresses family child care. Each of these chapters offers guidance on five critical program components of high-quality care and education: (1) arrangement of the environment to promote positive behavior and learning; (2) selection and display of equipment and materials to address children's developmental skills and reflect their interests; (3) daily schedules and routines designed to respond to children's developmental needs; (4) daily program of activities and opportunities offered that promote children's learning and growth; and (5) supportive interactions in which adults respond to children, guide their behavior, encourage their explorations, and promote social development. (SD)