<![CDATA[This study examines the influence of the school social environment and the implementation of the Pancasila Student Profile Strengthening Project (P5) with a sustainable lifestyle theme on elementary students’ cooperative behavior. Using a quantitative ex post facto design, data were collected from 66 students selected through quota sampling from six elementary schools in Padang City. A Likert-scale questionnaire was employed, and data were analyzed using multiple linear regression. The results show that the school social environment has a positive and significant effect on cooperative behavior (11.5%), while P5 implementation contributes a greater effect (33%). Simultaneously, both variables explain 35.3% of the variance in students’ cooperative behavior. These findings indicate that both a supportive social environment and project-based learning play important roles in fostering cooperation. Strengthening their integration is essential to optimize students’ collaborative character development. ]]>
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