The problem with many christians is that they want to hide their children from the many harsh realities life presents.

 Public education is important for a child. It helps them learn to interact socially, to learn right from wrong, and make thier own mistakes. It helps prepare a child for the adult world waiting for them.

 You can hide a child from life as much as you want, but when they turn into adults and get jobs, move out, and explore life, they'll be shocked by stuff they never would have imagined existed.

 As christians, you shouldn't find ignorance as a haven for your children. Instead, teach them right from wrong, and let them make their own destinies. Your god gave you free will for a reason.

 It will also help teach them the guises that lies take, and it will help them be able to uncover them.