Title Information: Clear structure. For each lesson unit, there is at least one basic page and one material page. Basic pages convey subject matter in an easily understandable and clear manner. With meaningful illustrations, concise texts, key phrases, a vocabulary box, and differentiated tasks, students grasp and solidify the essentials. Material pages offer student experiments and material-based tasks. This allows competencies to be acquired and applied in a student-centered and action-oriented way. The materials increase in difficulty, enabling all students to be supported according to their individual performance levels. Additionally, there are specifically integrated special pages: Method pages guide step by step in learning a method, which is then applied on the material pages with longer texts and more challenging materials.