CSPI developed a case study that provides insights into policy strategy and advocacy best practices that resulted in passage of the Healthy, Hunger-Free Kids Act of 2010 (HHFKA). The case study outlines key lessons to help inform nutrition and public health policy initiatives, as well as continued implementation and defense of school nutrition. It describes how advocates used research to develop and advocate for policy change, compromises that were needed to advance the policies, changes in attitudes about school food policy over time, framing and messaging, the role of state and local policy that laid the groundwork for national change, and how challenges were resolved between stakeholders. CSPI also developed a short summary and infographic to accompany the article, which are available at: https://cspinet.org/schoolfoodcasestudy.