Cooperative Learning - a topic that concerns everyone! Learning by teaching and learning from others - this concept is gaining increasing importance due to educational curriculum reforms. Because those who explain learning content to others have understood it themselves. But how can cooperative learning be implemented in the classroom? This book provides you with concrete answers from practice. With the help of the WELL methods (mutual teaching and learning), your students engage with important learning content while simultaneously strengthening their social skills, for example through group puzzles or partner interviews. For systematic method training, the volume includes explanations of the conceptual background of the WELL methods, information on learning strategies, guidance on performance assessment and self-evaluation, as well as ready-to-use worksheets for various subjects and grade levels.