A growing number of U.S. companies across a range of industries are designing apprenticeship programs to give workers access to on-the-job learning opportunities that allow them to transition into in-demand jobs and careers. This discussion paper provides a snapshot of the current state of apprenticeship in the United States based on interviews with national experts and key stakeholders engaged in apprenticeship implementation, including employers, community colleges, unions, and intermediaries. It explores what is needed to build successful programs and highlights current federal and state policy efforts to encourage registered apprenticeship expansion, noting barriers and lessons learned. Four recommendations for how to grow registered apprenticeship opportunities in the United States are: (1) Provide standardized models; (2) Reduce complexity; (3) Measure Value; and (4) Learn from Innovative Models. A sidebar presents examples of state incentives and supports for apprenticeship programs in Colorado, Maryland, and South Carolina. [This paper was produced with funding from the Nestlé USA corporation.]