This manuscript describes our effort to apply a novel approach to understanding student outcomes associated with a schoolwide antiracist intervention. We report a multimethod quantitative approach to evaluate a 10-week antiracist intervention designed and implemented by school staff by examining patterns of student intervention engagement and measures of key constructs that connect to antiracism, psychological well-being, and school connectedness. Our novel approach combines schoolwide surveys with smaller samples of daily diary participants, documenting variation in intervention engagement and examining postintervention outcomes. Our findings are limited by high attrition rates, small sample size, and data collection during the COVID-19 pandemic; however, our methods offer a promising transferable approach to evaluate school-based antiracist interventions by examining patterns and predictors of intervention engagement, as well as daily fluctuations in student experience throughout the intervention period.