On the basis of the role and the social exchange theories, this research investigated the direct and indirect antecedents of three dimensions of team performance (proficiency, adaptivity, proactivity) developed through cooperative education. The theoretical model examined how proactive socialization behaviors led to team socialization and team performance, and how team socialization mediated the relationship between proactive behaviors and team performance. Results from multiple linear regressions on a sample of 2905 student-workers involved in cooperative education programs globally supported the model. Theoretical and practical implications, as well as limitations and propositions for future research, were discussed. [Paper presented at the World Association for Cooperative and Work-Integrated Education, International Research Symposium on Cooperative and Work-Integrated Education, (2nd, Victoria, British Columbia, Canada, 2016).]