“…Theorists from various fields argue that as the complexity of the discipline knowledge being taught increases, the importance of the teacher's content knowledge and specific pedagogy becomes more profound (Chen, Kakyuga, & Sweller, 2016;Kirschner, Verschaffel, Star, & Dooren, 2017). Unfortunately, international comparison does not paint a favourable picture of Western preservice teachers' mathematical content knowledge (MCK), particularly in the primary teaching years but also extending into secondary teaching (e.g., Burghes 2011;Hine, 2015;Kim et al, 2011;Krainer, Hsieh, Peck, & Tatto, 2015;Ma, 1999;Tatto, Rodriguez, & Lu, 2015;Tatto et al, 2008). Those studies that have looked at the depth of MCK of middle school pre-service teachers, in the West in particular (e.g., Burghes, 2011;Kleickmann et al, 2013;Hind, 2015;Krainer et al, 2015;Tatto et al, 2015), indicate patchy MCK.…”