Punchasupawong S. EFFECTS OF USING A CONCEPT ATTAINMENT INSTRUCTION MODEL ON MATHEMATICS LEARNING ACHIEVEMENT AND RETENTION OF UNDERGRADUATE STUDENTS IN ELEMENTARY EDUCATION PROGRAM. JSBA [Internet]. 2022 Dec. 30 [cited 2024 Apr. 29];7(12):41-54. Available from: https://so04.tci-thaijo.org/index.php/JSBA/article/view/262597