The field of education is progressively building capacity and tools for producing rigorous research evidence to use in improving educational practice and outcomes. The knowledge base is lacking, however, in explicating the dynamics of research-based decision making and exploring connections between the work of research-practice partnerships and changes in educational outcomes. Drawing on experiences and data collected over a decade in mixed-methods research, we describe a case example of how research evidence developed in a multidistrict collaboration was used by one district partner to inform ongoing improvements in publicly funded tutoring programs. We employ both qualitative and quantitative analysis in exploring probable linkages between research-based changes made by the district partner and academic outcomes over time.