This study aims to determine the effect of the project-based learning model on students' learning outcomes in science on the subject of ecosystem harmony in grade V at SD Negeri 93 Ambon. The type of research used is quantitative with a quasi-experimental method and a pretest-posttest control group design. The results of the study indicate that there is a significant effect on student learning outcomes between the group taught using the Project-Based Learning (PjBL) model and the group taught using the lecture method in science lessons on the subject of harmony in ecosystems.
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