Morkle CE, Ali CA. APOS Framework Didactize Equivalence Linear Simultaneous Equations in Senior High School Mathematics. J Res Math Sci Technol Educ [Internet]. 2024 Oct. 22 [cited 2026 May 1];1(2):84-100. Available from: https://spm-online.com/jrmste/index.php/journal/article/view/13