Samanya, kanok-on, Benchaporn Wannupatam, and Chaloemchai Charoenkiatkan. 2023. “The Effects of Using Phenomenon-based Learning with the R-C-A question technique in the topic of Environment in the Community on Learning Achievement and Problem-solving Ability of Prathomsuksa 3 Students: The Effects of Using Phenomenon-based Learning with the R-C-A question technique in the topic of Environment in the Community on Learning Achievement and Problem-solving Ability of Prathomsuksa 3 Students”. RATANABUTH JOURNAL 5 (3). Yasothon, Thailand:458-72. https://so07.tci-thaijo.org/index.php/rtnb/article/view/3890.