English as a second language; ESL; TESOL ; Ingroup communication ; Classroom communication; Instructional communication ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Collaborative text production; Coauthorship; Text production (cooperative) ; Canada (English language in) ; Kanada (engl. Sprache in) ; English in Canada