Aug. 26 (HealthDay News) -- Schools across America are showing progress in key areas related to health, including nutrition, physical education and smoking, federal health officials reported Monday. The results of a 2012 comprehensive survey of school health policies showed some encouraging trends, according to the report from the U.S. Centers for Disease Control and Prevention. "Schools play a critical role in the health and well-being of our youth," CDC Director Dr. Thomas Frieden said ...