Purpose Although U.S. public education is state-based, federal policies have recently shifted toward more centralized curriculum and externalized accountability. The U.S. has also experienced increased diversity from internal demographic shifts as well as global population migrations (U.S. Census Bureau, 2020). The purpose of this paper is to present new ISSPP cases with a specific focus on how successful principals reconceptualize accountability beyond externalized evaluations. Cases are located in the Northeast, Southeast, Southwest, and Midwest, including public, religious, and reservation community schools that serve traditionally marginalized populations in public schools. Framework and Methods The U.S. case studies in this paper utilize the new ISSPP theoretical framework (Bronfenbrenner, 1979; Morrison, 2010), extant empirical studies (e.g., Day, et al., 2008; Fullan, 2003; Leithwood, 2001; Author, 2024) and research methodology which was recently revised to include a comparative mixed methods approach to construct case studies in diverse cultural regions of the U.S, including Alabama, Arizona, Massachusetts, and Texas. Research teams examine schools and leadership through the lens of ecological systems theory (Bronfenbrenner, 1979) as it illuminates interacting layers of social and ecological systems amidst rapid, complex changes (Morrison, 2010). Some research teams focus on public schools while others include religious schools; some schools are situated in districts that have tighter coupling with support within accountability mandates and district systems while others have more loose coupling whereby schools seek out programs and innovations on their own initiative. Data sources include semi-structured qualitative interviews with the district leaders, principal, teachers, parents, and students and school surveys in order to provide a more elaborated understanding of the phenomena i.e., school success and the principal’s leadership contribution to that success. Findings and Implications Findings indicate that, amidst contemporary complexities and influences, successful principals develop a positive and hopeful school direction for change that meets or exceeds accountability policy requirements for all children. In so doing, principals cultivate leadership capacity among teachers, students, and parents to redefine accountability as a value serving the needs of students and education as a human and just endeavor. Successful principals also influence and educate district leaders and even state leaders about broader and more nuanced conceptions of accountability in relation to the cultural wealth of their increasingly diverse communities. The paper features rich descriptions of case study findings comparing how internal accountability supports children in diverse U.S. school contexts and concludes with implications for leadership preparation and research.

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