DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Glottodidaktik; Lehrforschung; Pädagogische Linguistik; Pedagogical linguistics; Language teaching research ; Pragmatische Kompetenz; Pragmatic competence; Communicative competence ; Situativer Kontext; Kontext (situativer) ; Sprechsituation; Situation (context of) ; Utterance meaning; Contextualization cues; Context of situation; Situationsgrammatik; Context (pragm.) ; Classroom communication; Instructional communication ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; German