Systematic language education in all subjects. Language is a key competence for academic success. It serves as the medium for every subject and is therefore an essential prerequisite for understanding and learning subject-specific content. This content becomes increasingly complex and abstract throughout the school years. Consequently, educational and subject-specific language skills are crucial for student success. This volume particularly focuses on children with less developed language abilities and describes how obstacles can be overcome through targeted language support. Starting from discussions on the importance of language as a key competence for academic success, the authors raise awareness of understanding language learning as a task for all subjects and demonstrate ways to design language-sensitive instruction in the subjects of German, Mathematics, and General Studies.