“…Researchers claim that when mathematics teachers have a high level of MKT, that will pave the way for high MSE because it eases teachers' cognitive process and allows them to give more attention to the instructional process (Rushton et al, 2016). Other variables that help to validate this relationship are teachers' mathematical degree (Corkin et al, 2016;Ekmekci et al, 2019) and background (Corkin et al, 2015;Stevens et al, 2013), and the mathematical context of the MSE and the MKT scales (Austin, 2015). Therefore, the relationship between the MSE and the MKT could turn to be harmful or disappear when math teachers lack experience or knowledge, have low ability for self-evaluation, or utilize less valid instruments to measure the MSE or the MKT (Austin, 2013(Austin, , 2015Francis et al, 2017;Norton, 2019aNorton, , 2019bStevens et al, 2013;Thomson et al, 2017).…”