Achieving the Dream colleges engage in a process of institutional improvement to increase student success. A central component of this process is engaging internal and external stakeholders to help develop and implement interventions or changes in programs and services that improve student success. To determine whether these interventions do indeed improve student outcomes, and what changes and refinements should be made to produce further improvements, colleges need to evaluate their interventions. Achieving the Dream institutions are expected to develop plans for evaluating student success interventions before they begin their implementation. These plans should specify the collection and analysis of quantitative and qualitative data that will form the basis of the evaluation. The plans should also indicate how the results of the evaluation will be used to improve the effectiveness of the interventions. Having the capacity to effectively evaluate student success interventions is necessary for meeting the expectations of funders, accreditation agencies, students, policy makers, and the public. It is essential for continuously improving the impact of programs and services on student learning and success. This guide is designed to help colleges plan and conduct effective evaluations of their student success interventions. A list of resources is included. (Contains 6 figures.)