The quality of Indonesian language instruction in elementary schools is closely related to the instructional approaches and media teachers employ. This study examined the effects of Project-Based Learning (PjBL) integrated with interactive video on the Indonesian language learning outcomes of fifth-grade students. Using an ex post facto quantitative design, this research was conducted with fifth-grade students across public elementary schools in the Bukit Kerman District. Data were collected through documentation of student scores and a structured questionnaire, and analyzed using simple linear regression and multiple regression techniques. The results indicated that PjBL implementation had a significant independent effect on learning outcomes (β = 0.512; p < 0.001; R² = 0.262), as did interactive video utilization (β = 0.487; p < 0.001; R² = 0.237). When examined simultaneously, both variables together explained 40.3% of the variance in student achievement (R² = 0.403; F = 28.74; p < 0.001), suggesting that the integration of active, project-driven pedagogy with dynamic multimedia supports the development of higher-order language skills among young learners and offers a practically viable approach to improving Indonesian language instruction in rural elementary school settings.
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