This case study describes a partnership between New Leaders and the Arlington Independent School District to develop a pipeline of well-prepared school leaders. Powered by a perfect alignment between district priorities and New Leaders' expertise, Emerging Leaders delivered immediate benefits for Arlington students: At the end of the first year, 72 percent of Emerging Leaders led achievement gains across the classrooms they supervised. In math, every participant met that bar, with 75 percent leading double-digit gains across their teams. With solid skills and a record of strong instructional leadership, Arlington officials were confident that participants were ready to lead: more than half were promoted directly into principal or assistant principal positions.