Respectfully submit that you may be at least partially mistaken. My wife and daughter are conservative, Christian teachers chafing under the constraints of common core and PC. They giggled their way through ed school to get the certification and make a living. There are many more like them. We read about the most egregious cases of liberal indoctrination, but there are thousands of good teachers out there who ignore the "guidelines" and teach the truth when nobody is listening. They will be ready for duty when President Trump nukes the federal restraints on good education. Probably won't happen right away in the big cities, but the rural areas are yearning for freedom.
1) If Christians teachers sneak in “truth” then they are teaching children that Christians are sneaky.
2) Christians are law breakers since the law demands a godless worldview in the government schools.
3) Christians are wimpy, lukewarm, and generic since they fail to boldly witness their faith.
4) Christians are hypocrites since they are establishing and promoting a godless worldview in direct opposition to their faith's beliefs. They do it for money.
So?.....Are real missionaries going to have an easier time of it or harder when these student reach adulthood when their exposure to Christianity has been with wimpy,l law breaking, ukewarm,and sneaky hypocrites?