This study aimed to determine the effect of using Pop Up Book media on the science process skills of fourth-grade students in science and social studies (IPAS) learning at the elementary school level. The study employed a quantitative approach with an experimental method using a Pre-Experimental design, specifically the One Group Pretest-Posttest Design. The participants consisted of 25 fourth-grade students of SDN 2 Wangunjaya selected through a saturated sampling technique. Data were collected using pretest and posttest instruments developed based on science process skill indicators. The results showed that the mean score increased from 36.3 in the pretest to 79.2 in the posttest. The hypothesis testing using a paired sample t-test yielded a significance value of 0.000 < 0.05, indicating that the use of Pop Up Book media had a significant effect on students' science process skills. In addition, the N-Gain score was 0.67, which falls into the moderate category, indicating an improvement in students' abilities after the learning process. Therefore, it can be concluded that Pop Up Book media is effective in improving the science process skills of fourth-grade students in IPAS learning at the elementary school level.
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