“…We initially identified seven sociomathematical norms that cut across the relevant literature (Cobb, Stephan, McClain, & Gravemeijer, 2001;Kazemi & Stipek, 2001;McNeal & Simon, 2000;Tatsis, & Koleza, 2008;Van Zoest, Stockero, & Taylor, 2012;Yackel, Cobb, & Wood, 1991;Yackel & Cobb, 1996) and prepared a classroom scenario for each norm to test teachers' understanding of these norms. We piloted these early scenarios on 15 mathematics teachers from different school levels and revised them based on our experience.…”