Extend physical education to include regular exercise in the home, and present proper sleeping, eating and exercise habits as part of a larger picture of personal wellbeing. Talk regularly about the relationship of exercise to health, productivity, even economics. Discuss various health problems that can be eliminated or minimized by regular exercises or stretching. Pick from existing exercises already used in class.
Students can teach exercises to adults at home.
Have kids figure out an exercise regimen they can undertake at home. Include stretching exercises that may be done as part of TV watching Children can talk with their parents about their physical activity as children, and why they do or don't exercise now. Students can keep a chart of exercises performed nightly by themselves and their parents. Write about results of their teaching experience. Can have adults help them check and record their heart rate before and after exercise.