Integrative language teaching in heterogeneous learning groups: The book provides fundamental and in-depth insights into initial language instruction, connecting scientific and pedagogical foundations with practical suggestions for teaching. Starting from the learning prerequisites of school beginners, it focuses on areas such as diagnosis, lesson design, learning support, and promotion. The aim is to achieve an integrative German language instruction where different competency areas are interconnected. Special attention is given to literacy acquisition under heterogeneous conditions, with background knowledge and practical suggestions for multilingual learning groups and for lesson planning in inclusive settings. This compact foundational work is aimed at teacher education students, trainees, and newcomers to the profession.