<![CDATA[This study aimed to analyze the effect of the science experiment method on elementary students’ Integrated Science and Social Studies (IPAS) learning outcomes within the implementation of the Merdeka Curriculum. The study was motivated by the low level of student engagement and conceptual understanding in IPAS learning, which was still dominated by conventional teacher-centered instruction. Previous studies have primarily focused on science subjects separately, while empirical studies investigating experiment-based learning in integrated IPAS subjects remain limited. This research employed a quantitative approach using a quasi-experimental method with a one-group pretest-posttest design. The sample consisted of 23 fourth-grade students at SD Negeri 044825 Gundaling I selected through total sampling. Data were collected through learning achievement tests, observation sheets, and documentation. The data were analyzed using descriptive statistics, normalized gain (N-Gain), paired sample t-test, and Cohen’s effect size analysis with the assistance of SPSS version 25. The findings revealed a significant improvement in students’ learning outcomes, indicated by the increase in the mean score from 63.04 in the pretest to 92.76 in the posttest. The paired sample t-test showed a significance value of 0.000 < 0.05, indicating that the science experiment method significantly affected students’ IPAS learning outcomes. Furthermore, the N-Gain score of 0.80 was categorized as high, while Cohen’s d effect size of 1.87 indicated a strong effect. The findings imply that experiment-based learning supports active, meaningful, and student-centered learning experiences that align with the principles of the Merdeka Curriculum in elementary education.]]>
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