Samattakarn S, Sawekngam W, Makanong A. DEVELOPMENT OF AN INSTRUCTIONAL MODEL BASED ON CONCEPTUAL CHANGE MODEL AND LESH’S TRANSLATION MODEL APPROACHES TO ENHANCE MATHEMATICAL CONCEPT OF LOWER SECONDARY SCHOOL STUDENTS. JSBA [internet]. 2022 Apr. 30 [cited 2026 Mar. 6];7(4):259-76. available from: https://so04.tci-thaijo.org/index.php/JSBA/article/view/255222