The worksheets are ideally suited for the challenging interface between textbook and practice, making them particularly useful for the phase of in-depth practice as well as for internal and external differentiation—regardless of whether your students are learning individually, in pairs, or in groups. The tasks are organized into three levels of difficulty. Additionally, the competency assignments make it easier for you to choose. All tasks and solutions are also editable and included on the accompanying CD, allowing you to create customized exercises for your students. All tasks have been successfully tested in practice. Tests on each topic facilitate your lesson preparation and can be used by teachers and students for assessing learning progress. The topics include: - Percentage calculations - Interest calculations - Basic geometric constructions - Assignments - Area and perimeter calculations.