A well-structured task apparatus trains the application of new content. Colors and symbols clearly indicate three different levels and tasks for the training of process-related competencies. Different approaches make it easier for various learning types to get started: whether discovering through everyday and intra-mathematical questions or reading example-related teaching texts—numbers and sizes enable all learners to understand and actively learn. Topics encourage networking and interdisciplinary, project-related work. Methods pages train mathematical reasoning and the use of mathematical tools. Mixed exercises provide a deeper insight into mathematical contexts and everyday applications. A self-diagnosis test provides feedback on the individual learning progress.