Hold a T-shirt design contest that promotes participation in sports. Promote the Presidential Physical Fitness program, or another fitness club. Encourage all girls to participate, whether they are on a school sports team or not. Over the course of the school year, the girls' progress is measured in a variety of basic fitness and sports skills. Give special recognition to girls who make the most improvement or girls who have never tried a sport before.
Girls sign up in teams and the tournament lasts over a period of weeks.
This will not only promote girls' athletics, but will help to create camaraderie between individual grades and students. Work with local Brownies or Girl Scout groups to organize sporting events through those organizations. Find out what activities can earn the girls badges and hold tournaments, clinics, etc., in which older, more experienced girls teach the younger girls. Host a mother-daughter clinic on a Saturday morning. In the gym, set up sports stations that the mothers and daughters rotate through.