This text is designed to help preservice and inservice teachers develop an appreciation of the power of working together and develop the knowledge and skills necessary to create classrooms where students become empowered as learners. It addresses the difficult questions that teachers often ask about cooperative learning such as, “Why should I use cooperation?”, “When, how and how much should I use cooperation?”, and “How about the kid who?”. The featured scenarios have been developed from “real” classrooms and the models, examples, and activities used throughout the text have been extensively field tested with both preservice and inservice teachers.