Information about the volume: For the 9th grade, there is additionally the Student Book Basic. It leads to the secondary school diploma and qualifies for vocational maturity. Important content is repeated and connected to topics with tasks from the professional world. The level is aimed at students who require additional practice. Information about the series: Opening the doors to mathematics - even in classes with a wide range of abilities. Advantages of the volumes: Excellent diagnostic opportunities. Each chapter contains three tests - an introductory test, a mid-term test, and a test to prepare for a class exam. Each learning unit is clearly divided into tasks for exploration, 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.