Modern language teaching is no longer grammar based, but based on authentic real life dialogues (dialogic speech acts) which enable learners to communicate or rather to interact verbally and nonverbally competent with native speakers. The conception of language teaching curricula, especially with regard to the development of textbooks, is in need of an applicable model of communication, based on regularities or principles of language-usage. Both, Integrationism and the Mixed Game Model (MGM) opt against segregational static approaches of linguistic analysis and – at first glance – could be considered suitable approaches within the field of language teaching. Yet, this paper argues that the Integrational approach is hardly applicable here, whereas the MGM perfectly suits the needs of foreign language textbook authors and editors.