Sasang S, Klaimongkol Y. Effects of STEM Education Using Engineering Design Process on Problem Solving Ability of Elementary Students. OJED [internet]. 2020 Jun. 29 [cited 2026 Aug. 27];15(1):OJED1501003 (11 pages). available from: https://so01.tci-thaijo.org/index.php/OJED/article/view/222493