TDNet Discover

This quantitative, non-experimental study examined the impact of the 4x4 block schedule on high school graduation rates at a suburban Georgia high school, guided by Lewin’s Change Theory as the theoretical framework. Using archival data from adjusted cohort graduation rates spanning 2015 through 2023, the study explored whether the implementation of the 4x4 block schedule, a structural change in instructional organization, was associated with measurable improvements in student outcomes. Graduation trends were analyzed for the overall student population as well as for the Black and Hispanic subgroups. Statistical analyses, including independent samples t-tests and effect size calculations, revealed that the 4x4 block schedule was significantly associated with increases in graduation rates for the overall cohort and Black and Hispanic students, indicating meaningful educational gains. Findings suggested that structural reforms, when guided by principles of planned change, can enhance instructional depth, strengthen teacher–student relationships, and provide targeted opportunities for remediation and acceleration, thereby supporting persistence and timely graduation. Limitations included reliance on archival data from a single school, absence of variables such as student motivation and family support, small subgroup sizes, and the inability to establish causality due to the pre-post design. Future research should include replication across multiple contexts, investigation of underlying mechanisms, longitudinal tracking of postsecondary outcomes, and examination of implementation fidelity. Overall, the study provided evidence that the 4x4 block schedule, as a planned organizational change, can promote equity and improve graduation outcomes.