Blending the fields of group process and cooperative learning; prevention and resiliency; learning theory; and school change into a comprehensive guide, this book describes the on-going development of the Tribes group process, whereby small learning groups are used to promote human growth and learning. A tribe consists of three to six students who work together each day throughout the school year. Through the process, students learn to use specific collaborative skills, and to reflect on both the interaction and the learning that is taking place. Tribes are formed on the basis of sociometrics to evenly distribute boys and girls, students of high and low peer acceptance, and ability levels. The book is divided in 12 chapters. The first chapter gives a brief description of the project and its implementation. Chapters 2 and 3 analyze the goals of the project and the principles and theories behind them. Chapters 4 through 6 describe ways of forming Tribe groups and making them work in a classroom. Chapters 7, 8, and 11 suggest strategies and activities for designing and implementing learning experiences appropriate for the project's educational objectives. Chapters 9 and 10 present the opinions and commentary of people who have implemented the Tribe project. Finally, chapter 12 proposes different resources for implementing the project and assessing the progress of participating students. The appendix includes a 76-item bibliography, Tribes classroom posters, notes from chapters 1-10, and materials for the Tribes Learning Community. (AA)