ELE; Español como segunda lengua; ELSE ; Lehrgrammatik; Unterrichtsgrammatik; Pädagogische Grammatik; Didaktische Grammatik; Schulgrammatik; Pedagogic grammar; Grammar (teaching of) ; Frequency (morph.) ; Focus group (method.) ; Gruppenspezifische Kommunikation; Group communication ; Classroom communication; Instructional communication ; Metalinguistic awareness; Phonologische Bewusstheit; Phonological awareness; Focus on form (language teaching) ; Sprachbewusstsein; Linguistic awareness ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Imperfekt; Imperfect; Imparfait; Preterite; Indefinido; Past tense ; Collaborative text production; Coauthorship; Text production (cooperative) ; Spanish