Obesity among children is one of the most pressing public health problems in the United States, and rates of childhood obesity differ dramatically by social class and ethnicity. We link FITNESSGRAM data collected in NYC to individual student and school characteristics to better understand the influence of various school and environmental characteristics on student health and wellbeing. Specifically, we estimate the impact of school food policies on student BMI, obesity and academic outcomes. We also examine the relationship between the food environment and child BMI by examining the availability of healthy and unhealthy food in children’s geographic communities.