Presented in this report are results from a study conducted to evaluate the impact of Project Developmental Continuity on children's development and academic achievement. Following the first chapter's introductory overview of the study's objectives and organization, chapter 2 documents the data collection methods and summarizes the analysis questions addressed in the remainder of the report. Chapter 3 presents the results of analyses designed to highlight the nature of the sample and the characteristics of the various instruments, including a presentation of descriptive data taken on the sample and an analysis of attrition patterns and the effects of attrition on the characteristics of the sample. Information about the instruments is then presented in terms of the distributions of scores, internal consistency and stability of individual measures, the factor structure of the battery, and the relationships of the measures to criteria of "social competence." Chapter 4 examines treatment effects, presenting findings of program impact separately for English-dominant and Spanish-dominant samples. Finally, all results are summarized in chapter 5. A description of the instruments used in the study is appended. (MP)