This report in brief shares findings from the RAND Corporation's five-year study of The Wallace Foundation's University Principal Preparation Initiative (UPPI). The job of the school principal has become much more complex and demanding over the past several decades. Many university-based principal preparation programs (PPPs)--which prepare the majority of school principals--have struggled with how to make the fundamental changes needed to prepare principals for today's schools. To test a path forward, The Wallace Foundation provided grants to seven universities and their partners to redesign their PPPs in line with research-supported practices. Key findings, which suggest that significant change around research-based practices is possible, are presented in this report. This report illustrates that it is feasible for universities -- in partnership with high-need districts, state agencies, and with the support of mentor programs that have engaged in successful redesign -- to improve principal preparation programs to reflect the best available evidence. [For the full report, see ED620465.]