Social workers often are reluctant to use evidence-based practice in group work. Part of this reluctance is because of the perceived rigidity of the process and its emphasis on research. However, social workers can rely on the four cornerstones of evidence-based practice-research, clinical experience, personal views, and client's perspective-to provide an evidence-based group intervention. In this article, the authors illustrate how social workers used the four cornerstones at one alternative high school to provide an evidence-based group intervention. These cornerstones were used from the beginning of the process, which started with choosing the type of intervention, through the end of the process, which concluded with assessing the intervention. In this article, the authors show that it is possible for social workers to provide an evidence-based group intervention, while remaining flexible, thereby contributing to social workers' knowledge of how to use evidence-based practice with groups.