The workbook "Mathematics Today 10" offers comprehensive support for learners in secondary education in Berlin and Brandenburg. It is designed to facilitate access to mathematical topics and promotes the development of reasoning and communication skills. The structure of the workbook allows learners to work independently and develop their learning strategies. Each learning unit begins with a clear introduction, followed by tasks that provide a wide variety of practice opportunities. The worked-out solutions to the tasks support independent review and repetition of content. The workbook places particular emphasis on differentiated tasks, which are offered at three levels to meet diverse learning needs. The innovative design of the tasks not only fosters an understanding of mathematical concepts but also their application in various contexts.