Sanloeng, YingManunya, and Savitree Thoatho. 2021. “The Development of Learning Outcome With STEM Education Sciences and Technology Substance Group Entitled ‘Materials Around us’ for Prathomsuksa 2 Students”. Ubon Ratchathani Journal of Research and Evaluation 10 (2):1-11. https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/249967.