Assess and evaluate the effectiveness, equity, and ethical implications of school-based physical activity policies intended to reduce childhood obesity. Test understanding of evaluation methods and evidence types (RCTs, quasi-experimental designs, process vs outcome measures), key effectiveness indicators (BMI, fitness, activity behavior), equity dimensions (access, socioeconomic and racial disparities, differential implementation, cultural responsiveness), ethical concerns (autonomy, consent, stigmatization, surveillance, balancing individual rights and public health), and considerations of cost-effectiveness and unintended consequences. Expect analysis of study designs and metrics, interpretation of data, critique of policy impact on diverse student populations, and formulation of equitable, ethically sound policy recommendations and monitoring strategies.