While finding interventions with proven effectiveness has become easier through resources like the What Works Clearinghouse (WWC), identifying what works for diverse student populations can still be challenging. Knowing the context, specifically, sample demographics for research, can help bridge this gap. In a recent scan of studies that met WWC standards with and without reservations, and that had at least one statistically significant positive finding, 70 percent of the resulting WWC reviews reported race for at least a segment of the study sample. Decision-makers can use this information, when available, to help decipher how effective an intervention might be for their specific students. This tip sheet explains the importance of the demographic information provided in research studies and provides steps to identify evidence-based practices and the sample characteristics behind the evidence.