Kongthum1*, Athittiya, Kochaporn Numnaphol, Niwat Sarakhun, Seangjun Kalam, Umaporn Wirat, Permporn Summart, and Piriyakul Singhara. “Developing learning achievement for Mathematics Subject on topic Fractions By activities inquiry-based learning (5Es) of students in Prathomsuksa 6 at Loeng Nok Tha Kindergarten School Yasothon Primary Educational Service Area Office 2: Developing learning achievement for Mathematics Subject on topic Fractions By activities inquiry-based learning (5Es) of students in Prathomsuksa 6 at Loeng Nok Tha Kindergarten School Yasothon Primary Educational Service Area Office 2”. RATANABUTH JOURNAL 6, no. 1 (April 28, 2024): 532–546. accessed May 28, 2025. https://so07.tci-thaijo.org/index.php/rtnb/article/view/4417.