This review of recent and on-going research on day care and preschool experimental and intervention programs was made to draw the findings together and to identify major research issues for the next two to five years. Chapter I describes the overall scope and purpose of the review as well as the major sources of information used, while Chapter II reviews recent and on-going research studies, including surveys of need, availability and utilization of day care, assessments of quality day care, studies of program costs, training programs for child care workers, and impact of demonstration models, primarily for infants and toddlers. Chapter III includes research findings and unanswered questions from day care and other types of early childhood development research, and these findings and questions are organized around the following areas: (1) auspices providing the day care, (2) staffing and training of staff, (3) facilities, (4) children in day care, (5) relationship of parents to the day care program, (6) curriculum, (7) support services, and (8) measurement and evaluation. Chapter IV presents the summary of research issues, priorities, and strategies for: (1) programmatic research, (2) evaluative research, (3) basic research, (4) methodological research, and (5) disseminative research. (Author/SB)