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Abstract

ABSTRACTThis research aimed to compare the learning achievement and problem-solving skills of 12th-grade students before and after learning through STEM-PBL principles, focusing on the ecosystem topic. Additionally, it explored students' satisfaction with the PBL approach integrated with STEM Education. The sample group consisted of 35 students from the 12th-grade science-mathematics program at Akkharasart Wittaya School during the first semester of the 2024 academic year, selected through cluster sampling. The research instruments included PBL lesson plans, learning achievement tests, problem-solving skills test, and student satisfaction evaluation. Data were analyzed using basic statistics such as mean and standard deviation, as well as paired t-tests.The results revealed the following: 1) Students' learning achievement significantly increased after the STEM-PBL intervention (t(34) = 30.11, p = .000, d = 5.09). 2) Students' problem-solving skills also significantly improved post-intervention (t(34) = 24.20, p = .000, d = 4.09). 3) Students expressed a high level of satisfaction with the PBL-STEM learning experience, with the highest satisfaction noted in the aspect of using real-life problem situations.?????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????? 6 ?????????????????????????????????????????????????????????????????? (STEM Education) ??????????????? ???????????????????????????????????????????????????????????????????????????????????????? ????????????? ??? ??????????????????????????? 6 ??????????????????????-?????????? ?????????????????????? ??????????? 1 ?????????? 2567 ????? 35 ?? ????????????????????? ???????????????????????????????????? ?????????????????????????????????????? ???????????????????????????????? ?????????????????????? ??????????????????????????????????? ??????????????????????????????? ?????? ????????? ???????????????????? ????????????? (t-test) ?????????????????????????????????? ??????????????? 1) ???????????????????????????????????????????????????????????????????????????????????????? .01 (t(34) = 30.11, p = .000, d = 5.09) 2) ??????????????????????????????????????????????????????????????????????????????????? .01 (t(34) = 24.20, p = .000, d = 4.09) 3) ????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????