A teacher adopts a communicative language teaching (CLT) textbook published in the United States of America. After one semester, the teacher observes that students are struggling because the textbook’s dialogues assume prior knowledge of American cultural practices (e.g., making snowmen, trick-or-treating, having a sandwich for lunch). The teacher decides to abandon the textbook and design their own materials based on local cultural practices.

Which of Kumaravadivelu’s (2001) three core Postmethod parameters best explains the teacher’s decision?