Second language acquisition (language teaching) ; Zweitspracherwerb (Unterricht) ; Foreign language teaching ; English as a second language; ESL; TESOL ; Concordance (computational linguistics) ; Metalinguistic awareness; Phonologische Bewusstheit; Phonological awareness; Focus on form (language teaching) ; Sprachbewusstsein; Linguistic awareness ; Kulturvergleich; Language and culture ; Type of discourse; Text types ; Picture post card ; English