“…Critical mathematical knowledge presents school mathematics as a source of social empowerment (Aguirre et al, 2017;Ernest, 2016;Gonzalez, 2009;Stemhagen, 2016) that underpins citizenship (Noyes, 2007;Watson, 2004) and democratic participation (Gutstein, 2012;Stemhagen, 2011). It has become the goal of those engaged in what is known as critical mathematics education (Agudelo-Valderrama, 2009;Brantlinger, 2013;Frankenstein, 1983;Gonzalez, 2009), whereby mathematics, focusing on equity, diversity, and social justice, helps students to question, critique and take action concerning important social and political issues (Aguirre et al, 2017;Felton-Koestler, 2017;Gutstein, 2012;Stemhagen, 2016). It challenges the view that mathematics lies outside the moral and ethical imperatives that underpin cultural life (Davis, 2001;de Freitas, 2008;Warnick & Stemhagen, 2007) and facilitates students finding an answer to their oft-asked question, "what good is all this stuff?"…”