Posawang, R., & Promkhet, W. (2026). A COMPARISON OF LEARNING ACHIEVEMENT BEFORE AND AFTER STUDYING THAI LANGUAGE ON FIGURATIVE LANGUAGE USING THE COOPERATIVE LEARNING PROCESS (GROUP INVESTIGATION: G.I.) COMBINED WITH CONCEPT MAPS FOR MATTHAYOMSUKSA 3 STUDENTS AT THUNGFON WITTAYAKARN SCHOOL, UDON THANI PROVINCE. Journal of Humanities, Social Sciences, and Arts, 8(1), 140–152. retrieved from https://so03.tci-thaijo.org/index.php/hsa/article/view/290506