A few schools in the Chicago area have started doing BMI screenings in children and, unfortunately, many parents have begun speaking out against the practice. BMI testing is a preventive measure. By helping children understand how weight, exercise and food choices affect their health early in life, schools are empowering them with the tools to live a healthy life into adulthood. Preventive measures that drive awareness and education have much greater success than measures like sin taxes that punish people for their choices. It is this awareness and education we need.