There is growing interest in the integration of social--emotional learning (SEL) and equity approaches in schools, yet systematic research on how to blend these two frameworks is limited. In this article, we describe the process by which a research-practice partnership (RPP) collaborated to iteratively co-create a multi-component equity-focused SEL preventive intervention in the context of a politically charged landscape related to the 'dual pandemics' of racial injustice and COVID-19 in the early 2020s. We conducted a document review of informal data sources (e.g., meeting minutes, correspondence) and analyses of formal data sources (i.e., teacher interviews, student focus groups) to describe how we overcame challenges to form an RPP, to demonstrate our collaborative intervention development efforts, and to assess feedback on the contextual appropriateness of the intervention. We discuss lessons learned from our partnership efforts and reflect on future directions for RPP-driven work to advance equity-focused SEL in K-12 public schools.