Given that you feel that way, I am certain you would have no objection to the government Taliban forcing your children into madrassas.
Gee! You could always discuss things when they got home, and they would be exposed to another viewpoint.
Right! And I'd be perfectly fine if teachers were executing students because parents can always teach their children they're not actually dead!
Sheesh. Overreact much? There are lines, obviously. where teachers overstep the boundaries between being a teacher and overtaking parental control. Whether or not they teach your particular version of history isn't one of them, or shouldn't be for rational thinkers. If my children were to come home telling me the earth was only 5000 years old, I'd work with them to dispel them of that notion. If they told me they learned man couldn't possibly have walked on the moon because they would have sunk in to the fine dust, I'd work with them to teach them how to approach that logically. If you disagree, teach your kids otherwise, or homeschool.