Composition (teaching of) ; DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Idioms (language teaching) ; Mother tongue (teaching of) ; Lehrplan; Instructional advice ; Wortschatz (Sprachunterricht) ; Lernwortschatz; Vocabulary teaching ; Pragmatische Kompetenz; Pragmatic competence; Communicative competence ; German