My daughter was required to run a mile just about every day at her elementary school in Virginia. Here's an article about a school in Mississippi that's doing the same thing, coupled with nutritional lessons, to great benefit of their students.
After seeing studies that ranked Mississippi among the nation's leaders in adult and childhood obesity, Sweeney and Tzotzolas decided to make daily exercise a point of emphasis this year. The easiest way to do that was to take the class outside for a run, with the ultimate goal of a mile.