“…Their understanding of issues such as pretest validity, posttest validity, test reliability, authenticity, and inauthenticity helps them enhance learning inside and outside the classroom. While there is no denying the fact that one of the major responsibilities of teachers is to measure and evaluate student achievement (National Education Association, 1983;Schafer, 1993), the research on teachers' knowledge of assessment has revealed that many teachers' knowledge and understanding of the essentials of assessment and evaluation is inadequate (Al-Bahlani, 2019;Coombe, Davidson, Sullivan, & Stoynoff, 2012;Coombe, Davidson, Gebril, Boraie, & Hidri, 2017;Jannati, 2015;Jawhar & Subahi, 2020;Lam, 2015;Latif, 2017;Popham, 2009). Despite the great significance of an educational culture that recognizes and promotes teacher assessment literacy, the progress in this regard, in any EFL/ESL context in general and in the study context-the Kingdom of Saudi Arabia-in particular, has been either very slow or not up to the required standards (Coombe, Davidson, et al, 2012;Coombe, Troudi, & Al-Hamly, 2012;Rajab, 2013;Umer, Zakaria, & Alshara, 2018).…”