“…Previous studies tended to focus in exploring SE teachers' knowledge, which consists 10 of the articles reviewed (Aiyeleso, 2016;Rosas & Cambell, 2010;van Garderen et al, 2013;Brownell et al, 2010;Feng & Sass, 2013;Martin, 2018;Brown, 2019;Greer & Meyen, 2009;Aydemir, 2013;Hinton et al, 2015). We found five studies which compared SE teachers' knowledge and general mathematics teachers' knowledge (Sheppard & Wieman, 2020;Goldman & Gilmour, 2020;Weiss et al, 2018;Alazemi, 2018), while only one study compared SE teachers' knowledge between pre-service and in service teachers (Flores et al, 2010). Finally, three articles focused on pre-service teachers' knowledge in mathematics (Griffin et al, 2009;Ekstam et al, 2017 b ;Rosas & Cambell;.…”