At the request of the Substance Abuse and Mental Health Services Administration (SAMHSA), the Research and Education Foundation of the American Association of Marriage and Family Therapy organized a series of 12 panels that focused on family issues in adolescent treatment. In these workshops, panelists discussed the importance of involving the adolescents family members in the treatment and presented innovative approaches for doing so. This monograph follows up on these conference panels to further clarify issues and treatment models and to explain the steps necessary to implement a family-centered approach to adolescent treatment. The monograph is designed for alcohol and other drug abuse and mental health professionals, paraprofessionals, administrators, and policymakers who want to learn more about family-centered treatment. An introduction explores the origins of the interest in family-centered treatment and presents specific examples of family-centered programs. Part 1 presents a brief overview of family systems theory and practice. Part 2 focuses on some specific aspects of family-centered clinical practice. Part 3 examines the administrative, organizational, financing, and training issues related to implementing a family-centered approach to adolescent treatment and outlines strategies for addressing these issues. Part 4 presents a checklist to guide the efforts of those who wish to implement a family-centered approach in their programs. Part 5 provides a selection of annotated references to help whose who are interested in learning more about specific aspects of family-centered treatment. Appendixes include references for resource organizations related to family-centered adolescent treatment and brief biographies of the authors who contributed to the monograph. (GCP)