Marattana C, Keeratichamroen W. A STUDY OF LEARNING OUTCOMES ON MATERIALS AND PROPERTIES OF MATERIALS LEARNING UNIT OF GRADE 5 STUDENTS USING STEM EDUCATION. Res Comm Soc Dev J [internet]. 2018 Dec. 7 [cited 2026 Sep. 28];12(3):149-62. available from: https://so04.tci-thaijo.org/index.php/NRRU/article/view/135505