The workbook "Understanding Nature - Biology (Volume 1)" offers a comprehensive revision for biology classes in the 5th and 6th grades. It is designed to provide students with a deeper understanding of biological fundamentals. With a clearly structured content and engaging tasks, the workbook promotes independent learning and active engagement with biological topics. The materials are designed to be suitable for both classroom use and self-directed learning at home. The revision takes into account current curricula and didactic approaches to provide optimal support for learners. The workbook is written in German and consists of 64 pages rich in information and exercises to deepen knowledge about nature and biological connections.