“…Given the above overview, it can be deduced that learners' challenges in understanding DM are not a uniquely South African problem but a global one. As such, scholars (Burdina & Sauerb, 2015;Khoo & Fitzgerald, 2017;Manzi et al, 2021;Ng & Chan, 2014;Ogbonnaya, 2023;Zhang, 2017) have argued and presented evidence that learners' challenges in understanding DM, especially the aspect of graphs, is because learners lack critical skills developed in economics. This paper argues that there is a gap in the literature which fails to account for the Topic Specific Pedagogical Content Knowledge (TSPCK) required by experienced economics teachers to teach the topic to improve learners' understanding.…”