This report summarizes the work undertaken by the Berkeley Unified School District's (BUSD) project to define a collaborative leadership planning/training model to combat school resegregation. In 1972, four years after full desegregation, the BUSD experienced a marked shift in the school population and its distribution. In 1976, the BUSD committed itself to cooperative action between school officials and municipal decision-makers to resist apparent resegregation trends. The first years of the three-year federally funded study witnessed the definition of the problem and the development of a collaborative hypothesis. During the second year attention was focused on the inside factors which tend to cause resegregation, such as the flight of white students to private schools, segregation of students within schools, staff ethnic patterns and staff age. Also examined were factors outside schools which could cause resegregation, such as housing patterns, employment realities, court decisions and legislation. The Collaborative Dialog for Change in Desegregation (CDCD) was developed in the project's third year. The basic assumption of CDCD was that a continuing, guided, collaborative action between schools and city decision-makers would ameliorate or avoid a natural tendency toward school resegregation. It specified the strategies and resources to be mobilized in counteracting the resegregation trend. Appended to this report are an annotated bibliography of recent literature on desegregation and resegregation, summaries of relevant court cases and legislation, and a listing of technical assistance resources. (RLV)