This article seeks to develop transformative social and emotional learning (SEL), a form of SEL intended to promote equity and excellence among children, young people, and adults. We focus on issues of race/ethnicity as a first step toward addressing the broader range of extant inequities. Transformative SEL is anchored in the notion of justice-oriented citizenship, and we discuss issues of culture, identity, agency, belonging, and engagement as relevant expressions of the Collaborative for Academic, Social and Emotional Learning 5 core competencies. We also point to programs and practices that hold promise for cultivating these competencies and the importance of adult professional development in making these efforts maximally effective for diverse children and youth. We conclude by offering a few next steps to further advance transformative SEL research and practice.