Janthasen , Wanvisa, Sutida Lekawattana, and Pawaree Kanchanapee Nilphai. 2026. “Effects of Cooperative Learning with Multimedia on Learning Achievement in Sex Education among Sixth-Grade Students”. Journal of Roi Et Rajabhat University 20 (2):140-52. https://so03.tci-thaijo.org/index.php/reru/article/view/302753.