This report describes the examination of impacts of principals trained by New Leaders on student achievement in Oakland Unified School District (OUSD). Founded in 2000, New Leaders has trained more than 1000 school leaders who are raising student achievement and graduation rates in high-need schools across the country. The New Leaders’ selection process is highly competitive, with substantial outreach to identify high quality applicants. New Leaders supports aspiring principals through a structured residency program and ongoing training and support after they assume leadership positions in schools. The New Leaders’ mission is to ensure high achievement for all children, especially children of color growing up in poverty. This report finds positive and statistically significant effects of attending a New Leaders-led school in OUSD on student achievement.