English as a second language; ESL; TESOL ; Komplexes System; Complex system; Emergenztheorie; Emergence (theory of) ; Systems theory ; Syntactic development; Morphological development; Morphologie (Spracherwerb) ; Syntax (Spracherwerb) ; Grammatical development ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Second language acquisition (psycholing.) ; Case study (second language acquisition) ; Zweitspracherwerb (lex.) ; Second language acquisition (lex.) ; Vocabulary (second language acquisition)
