School principals are charged with complex responsibilities that can include developing a school vision and culture, supporting teacher effectiveness, managing challenges and crises, communicating with the greater community, and more. However, recent research and surveys of school administrators indicate that principal preparation programs do not adequately prepare graduates to cope with school realities. In response to concerns about the state of initial principal preparation, The Wallace Foundation established the University Principal Preparation Initiative (UPPI), a four-year effort to redesign seven universities' principal preparation programs according to evidence-based principles and practices. Each university collaborates on the redesign with high-need school districts and a state partner, and is supported by a mentor program. This report focuses on the implementation of UPPI in its first year, from fall 2016 to fall 2017. The authors report on UPPI progress and identify cross-cutting themes in the UPPI implementation effort that can help other university principal preparation programs and their partners undertake their own principal preparation system improvement efforts. Key Findings: (1) UPPI programs began with some evidence-based features and contexts already in place; (2) UPPI partnerships used the first year to develop a vision for the new program and the redesign process. The teams at each site engaged in three primary re-envisioning activities: standards development, program assessment, and logic model development; (3) Each UPPI team focused on redesigning its curriculum and instruction; (4) UPPI leadership teams explored changes to clinical experiences and candidate recruitment and selection; (5) University-based leads--the individuals from each university leading the overall initiative at that site--and actively engaged partners drove the initiative in the first year; (6) UPPI prompted partner states and districts to consider issues and/or undertake activities they may not have otherwise; and (7) UPPI leadership teams developed strategies to mitigate the most pressing challenges, such as turnover and capacity limitations. [For the executive summary to this report "Launching a Redesign of University Principal Preparation Programs: Partners Collaborate for Change. RAND Principal Preparation Series. Volume 1. Executive Summary," see ED590581.]