This bill amends the Workforce Innovation and Opportunity Act (WIOA) to establish a comprehensive definition for the term "evidence-based" when applied to activities, services, strategies, or interventions. Under this definition, an initiative is considered evidence-based if it demonstrates a statistically significant effect on improving participant outcomes, supported by strong, moderate, or promising evidence from specific types of studies. Alternatively, an initiative can qualify as evidence-based if it has a rationale grounded in high-quality research or positive evaluation, coupled with ongoing efforts to examine its effectiveness. The bill also mandates that state plans under WIOA must describe the extent to which their activities are evidence-based. Additionally, states will be required to outline the strategies they will use to prioritize funding for these evidence-based programs through reserved statewide workforce development funds.