William S. Sanders

William S. Sanders is a renowned educational researcher known for developing value-added measurement, which assesses a teacher's impact on student learning over time. His work focuses on evaluating and improving educational quality by analyzing student progress rather than just test scores at a single point. Sanders’ methods help schools and policymakers understand how effectively teachers and schools contribute to student achievement, promoting data-driven decision-making to enhance educational outcomes. His contributions have significantly influenced educational assessment and accountability practices.