You are stupid if you do not think that the culture and the current laws do not over reach parents all the time.
We live in a country whee children can have an abortion at 12 and it will be kept secret from the parents.
you think that parents have ANY CONTROL over what happens to their teen or preteen sexually?
None
nada.
Get your kids out of public school. That is the only place they can control and indoctrinate them. Do it tomorrow.