Title Information: Excellent diagnostic options: Each chapter contains three tests - an introductory test, a mid-test, and a test to prepare for a class exam. Each learning unit is clearly divided into tasks for development, knowledge presentation, and exercises. Almost every exercise is available at two levels, allowing for parallel differentiation in teaching. Tasks for independent study and example-based teaching texts provide various approaches to the subject matter. Method pages for reference and interesting, interdisciplinary topic pages. Series information: Opening the doors to mathematics - even in classes with a wide range of abilities. Advantages of the volumes: Excellent diagnostic options.