This handbook has been revised in content and re-designed to have a more durable cover. The structured experiences that appear in this book are the "folk music" of human relations. They fall into three major categories: (1) unadapted "classic" experiences, (2) highly adapted experiences, and (3) innovated experiences. Like folk music, the origins of most of these structured experiences are difficult to trace. They have been passed from facilitator to facilitator by word-of-mouth, on scraps of paper, and on unsigned, undated mimeographed sheets.