Providing ninth-graders with academic and social support can put more students on the graduation path, but it can be challenging for schools and school systems to implement that support routinely and effectively. This brief describes how Broward County Public Schools adopted a community of practice (CoP) approach to improve school-based teams' ability to create success for students in their first year of high school. Drawing on interviews with district- and school-based staff members, reviews of documents, and observations of participants, the brief recounts how the CoP was developed and operated, and how it provided a professional forum for innovating, sharing, and learning among participating schools.