This book provides educators with the background and procedures needed to conduct group investigation, a method for classroom instruction in which students work collaboratively in small groups to examine, experience, and understand their topic of study. Significantly different from traditional instruction, group investigation is designed to appeal to all facets of the students' abilities and experience relevant to the process of learning, not just to the cognitive and social domains. Chapter 1 of the book is a comprehensive exposition of the fundamental ideas on which group investigation is built. Chapters 2 and 3 suggest ways of developing cooperative discussion and planning skills that are essential for carrying out group investigation. Stages of this learning process are explained in chapter 4, and detailed examples of actual projects are presented in chapter 5 (written with Dina Shemer). Chapter 6 reviews research on the effectiveness of group investigation, and finally, chapter 7 provides the outlines of two series of training workshops for teachers who wish to learn the group investigation method. Contains 99 references. (TJQ)