Hey, force everyone to go to school nude, including the teachers, the heads, the cleaners, and any school visitors--including parents.  Make clothing an out-of-school activity.  Celebrate the body!  My word...clothing is so culturally conditioned, it's...yes!  School is about education, not cultural conditioning.  Take those clothes off!  And that means you, Mr. Politician who wants to do the rounds...

(I am assuming schools are suitably heated/shaded.)

Don't fight forces, use them R. Buckminster Fuller.