Sudphom S. DEVELOPMENT OF 2S MODEL TEACHING PATTERN FOR SOLVING THE PROBLEMS OF HIGH SCHOOL MATHEMATICS AT THE BEGINNING OF PATHUMTHANI PROVINCIAL EDUCATION OFFICE. JSBA [internet]. 2020 Apr. 30 [cited 2026 Apr. 22];5(4):281-92. available from: https://so04.tci-thaijo.org/index.php/JSBA/article/view/241281