“…For more than four decades, the mathematics education research community has extensively researched problem solving in mathematics teaching and learning (Lester, 2013;Silver et al, 2005). Research into mathematical problem solving continues unabated (Yeo, 2017a;Yeo, 2017b;Silver, 2013). It is clear from research literature (Lester & Cai, 2016) that much energy and effort has gone into studying mathematical problem solving as an activity that can be taught.…”