For the Love of God, keep your children away from public school, (if that option is available for you) and the company of other bad men. You must do everything in your power to hinder the worldly school-system from indoctrinating your children, even going so far as moving from your country if your country forces public school on children. The responsibility of an eternal soul that is greater than the universe must not be lightly dealt with. If you can home-school your kids but doesn't do it, then you really don't care for the spiritual well being of your children. How can a Catholic parent with good conscience let his kids go to public school where he know they will be exposed to bad influences by other children, and brainwashed by teachings such as evolution and sexual education? Most of the things we learn in school is superfluous anyway and will never be needed. We are bombarded with unnecessary teachings that will occupy much of our time. This will lead souls to forget God and their own spiritual well being! The school system before was very different from today, for back then most states was Christian, and God and the Bible was not banned from school.
Will you allow your children to go to public school and go out with worldly or ungodly friends? Then sadly, you will in fact lose them to the world! God does not tell us as much as to be on guard against demons as with men (Matthew 10:17), for men are oftentimes more harmful to us then the devils are, for demons can be expelled by invoking the most holy names of Jesus and Mary, but man on the other hand cannot be expelled in the same way. And if a man tries to change his life, he will be reviled, despised, and called a most miserable fool, a good for nothing and a man of no education. Many weak souls sadly turn back to the vomit from such and like reproaches out of fear for the loss of human respect!