Information about the title: Workbooks with guide on work techniques. Each workbook comes with a methods booklet as a guide. It contains not only the basic repertoire of methods but also work techniques for the subject matter, specifically tailored to each grade level – a direct aid in solving tasks. Information about the series: Learning together, but differentiated. The Environmental Friends present subject-specific content in thematic contexts. The proven concept incorporates new differentiation offers. The strong promotion of competencies ensures learning success for everyone. The Environmental Friends form a cross-disciplinary network with the Language Friends and the Reading Friends. Regional editions follow the requirements of the curriculum content. Action-oriented learning is at the forefront for the Environmental Friends: methods booklets, experiments, and tasks convey knowledge.