Results of the secondary analysis of data obtained in a study of Head Start graduates in the public schools are presented and discussed in this final report. Unforeseen circumstances prohibited the full implementation of the original longitudinal research design, and, consequently, only one test battery was administered to first-grade students. The primary analyses of that data are reported in "A National Survey of Head Start Graduates and Their Peers" (ED 152 422-423); it is recommended that the original study and the secondary analysis be read sequentially for a coherent picture of the full study. Questions addressed in the secondary analysis are listed, and sampling procedures as well as designated variables are described prior to a discussion of the research findings. Head Start curriculum emphasis, ethnic composition of families and staff, sponsoring organizations, parent characteristics and involvement, teacher perceptions, preschool experience and academic achievement of children, interrelationships among predictors of child outcomes, characteristics of high-income Head Start families, and length of enrollment were investigated. For each of the general categories of research questions, findings are elaborated in technical discussions (including a depiction of recursive path models used) and in concluding statements. Statistical results are presented in 134 tables. Conclusions concerning academic and emotional development of Head Start children, ethnic and economic composition of the Head Start population, parent involvement, and regional effects are offered in the final section of the report. (Author/RH)