This study examined differences in fourth-grade students’ learning interest scores before and after using Educaplay-based learning media in the IPAS subject at SD Negeri 091277 Siantar Estate. A quantitative approach with a pre-experimental one-group pretest-posttest design was employed, involving 30 students selected through total sampling. Data were collected using a four-point Likert-scale questionnaire measuring enjoyment, engagement, interest, and attention. Of the 20 questionnaire items tested, 19 were declared valid. The reported Cronbach’s Alpha coefficient was 0.702. Data were analyzed using descriptive statistics, a paired-samples t-test, and N-Gain analysis. The mean learning interest score increased from 55.00 before the intervention to 80.00 afterward. The paired-samples t-test showed a statistically significant difference, t(29) = 12.042, p < 0.001, with a large paired effect size (dz= 2.20). The mean N-Gain was 0.6539 (65.39%), classified as moderate. These findings suggest that Educaplay-based learning media may support students’ learning interest and help teachers create more engaging IPAS lessons in elementary schools. However, the absence of a control group limits causal conclusions. Further controlled studies are needed to confirm these findings.
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