Get rid of gym, and get rid of the school buses. The kids will have to walk to school and thereby stay in shape. Problem solved!
Here's the problem. In my old district, some students are 4 miles from elementary school, 5-6 miles from middle school(6-8 Grade) and 8-10 miles from the high school.
Now high schools can tough it out, but there's no way a 5 year old can handle a 4 mile walk, and both parents oftentimes work these days.