Information about the title: Clear structure: systematic, integrative, and differentiated acquisition of foundational knowledge in the main learning area with "Test Yourself!" pages that connect with the second learning area and offer parallel differentiation as needed, as well as support pages. Preparation for class tests or project proposals on "Fit In" pages. Core principles: diagnostics, differentiation, teaching competencies. Free online diagnostics. Consistent differentiation at various levels. Learning transparency: advance organizer, self-diagnosis. Process-oriented preparation for class tests. Independent and cooperative learning. Information about the series output: clear structure: systematic, integrative, and differentiated acquisition of foundational knowledge in the main learning area with "Test Yourself!" pages that connect with the second learning area and offer parallel differentiation as needed, as well as support pages. Class color.