Kaewkhiao, P., & Chomphupart, C. (2026). DEVELOPMENT AND DISPARITY IN CUMULATIVE GRADE POINT AVERAGE (GPAX) OF HIGH SCHOOL STUDENTS AFFILIATED TO THE OFFICE OF THE BASIC EDUCATION COMMISSION: BIG DATA ANALYSIS FROM GPAX OBEC BASE, 2021–2023. Research and Development Institute Journal of Chaiyaphum Rajabhat University, 8(2), 262–278. retrieved from https://so10.tci-thaijo.org/index.php/rdicpru/article/view/3452