With a mixed-methods approach, this research delves into the variables that contribute to the educational achievement gap between pupils in Tamil Nadu's public and private schools. Along with quantitative data, such as standardized test results, attendance records, and statistics on resource allocation, qualitative insights from student surveys and interviews were also considered. Private schools often provide better infrastructure, higher-quality teaching, and greater parental participation, resulting to improved student outcomes; the findings show substantial disparities in academic achievement, resource availability, and socio-economic backgrounds. To battle these inequalities and advance educational fairness, the report stresses the importance of focused governmental actions. In addition to adding to the larger conversation about educational inequality, the results give concrete suggestions for how educators and representatives might raise the bar in public school classrooms.