While that may be true to some degree, the problem is that society has grown to have that expectation of the education system. Our society has grown to expect schools to not only teach math and science and english, but to also be a third parent. It's the school's job to teach kids about safe sex, about drugs, about how to be a good citizen....
And while I think those are all good, what has happened is that parents have, perhaps unconsciously, shifted that part of parenting to schools. And then when the schools fail (because they are not designed to be parents), people get upset.
Schools need to be more empowered to do what they are supposed to do which is impart knowledge upon our children and get them ready for their next phase of learning whether it is college or taking up a trade. Parents need to be more empowered to be the parents.
Well, i see it more as opportunistic that schools strive to teach ideology and "values" in the wake of dead-beat parents... things like "being a good citizen" are ultimately so subjective that when it is imparted by any institution or person its gonna have a self-serving-usefullness in the message ("to be a good citizen is to obey the laws..." etc)
Sure, teaching how sex and drugs work is fine, because it gives knowledge about how something works and leaving the ultimate decision to them... its very different to preach about sexual abstinence than to teach a person how condoms work or how reproduction works.
For sure, schools have an interest in imparting ideas about citizenship that will help keep the peace in the schools. I think ultimately it isn't out of any nefarious intent to create societal robots but more out of, "holy fuck I gotta keep these kids in line so they pass the damned tests and i don't get my funding cut." School administrations are under incredible
pressure to perform. And they're getting it from all directions. State government, local government, tax payers, parents, grand-parents, local media, etc., etc., They'll do what they need to do to keep that shit off their backs.
The federal government created that monster. Namely the asshats who constructed NCLB. The People continue to support that monster by NOT demanding its death.