2014 edition for primary schools in Bavaria. With the new approach to thinking and calculating, the competency expectations are fully met through an increased range of tasks and questions that encourage hypothesizing, experimenting, and reasoning. With this teaching material, children learn to tackle problems systematically and develop their own strategies. Cooperative learning forms such as partner work or math conferences provide opportunities to practice a variety of process-related skills. To promote independent work, more space is dedicated to introducing new task formats and all symbols used in the book. A calm, child-friendly layout with a structured range of tasks completes the work.