Samanya kanok- on, Wannupatam B, Charoenkiatkan C. 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. rtnb [internet]. 2023 Dec. 30 [cited 2025 Jun. 14];5(3):458-72. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/3890