There is absolutely no need for kids to be exposed to any kind of sexual education. This world got along perfectly fine before President Ronald Reagan instituted universal sex education and it will be fine if we remove it from schools.
Because school staff and teachers are unable to inject any moral instruction into sex education, they are ill-equipped to properly teach sex to children of any age.
So leave it to the parents to find better ways to instruct children on sex, from churches or other religious institutions.
This way, we have a solution that protects and respects the religious practices of parents while at the same removing this whole mess from the schools.