“…Unfortunately, most of our informants appeared to hold strong commitment to math knowledge, the arbitrary internal ordering of which appreciates hierarchical organizations of knowledge units similar to Bernstein's notion of vertical discourse (Bernstein, 1999). As this meaning orientation configures their professional identity, which directs how they define themselves and interact with others (Bernstein, 1996), it often leads teachers to take intellectual students as the main sources of their professional identity (Apple, 1988;Ashendon, Connell, Dowsett & Kessler, 1987;Author, 2020, Author, 2021. This techno-efficient approach thus reinforces the strong combination of teaching professional identity and academic curricula, which in this study saw the teachers designing assessment items with the intention of grouping students into different ability categories.…”