Let girls be girls and boys be boys.  Each should have their own sports division to keep the competition fair.  If that can't be done, then why not just abolish girls sports altogether and let boys and girls compete for spots on school teams?  That would, of course, mean that IF any girls made it onto teams, they would sit the bench forever in favor of faster, stronger, better male athletes.  Nature gave us only TWO genders; let's keep it that way in sports.