Language usage in US K-12 classrooms and beyond continues to be an issue of equity (Navarro Martell, 2021; Palmer et al., 2019). Teachers expect racialized students who appear to be Latinx to know and perform as if their native language is Spanish, mientras a otros se les celebra sus intentos de usar el espan~ol; otro idioma colonizador. Some…

In this article, the authors describe their efforts to assess prospective K-8 teachers' knowledge of proportional reasoning. Based upon their analysis of prospective K-8 teachers' work on a mathematics performance task, they discuss the implications for preparing prospective teachers to teach proportional reasoning to their students. In general,…