To contribute to best practices in educating social work students on environmental justice, we report the results of a study evaluating a module that was incorporated into the course Human Behavior and the Social Environment (HBSE). A mixed-methods design was used to examine student attitudes toward environmental justice. Participants were 61 Master of Social Work students from three cohorts. The students provided pre- and posttest responses to the Climate Change Attitude Survey. Students also offered 33 comments in response to an open-ended question about views on climate change. Overall, findings revealed increases in beliefs that climate change is negatively affecting the environment and that this change has a disproportionately negative effect on populations served by social workers. Feedback indicated students viewed the module as contributing to their learning. Results suggest that integrating environmental justice content into core courses like HBSE is a promising approach to strengthening environmental justice education in social work.