From here: http://da.rryl.me/2011/education-options-for-christians-intro/

When our first child was ready for school, we put her into a public school. We had reasons. We wanted her to be in the world, learn how the world works and be prepared. We wanted our family to be “light” in the world (for want of a clearer way of putting it) by teaching our children about the Lord and living that testimony with them before others.

But things came unstuck for us as we asked the children what they learned about at school. The answers often concerned us. Some of what the school taught as fact was not fact – it was philosophical or just plain opinion, and whatever it was, it was not in accordance with how the Bible says we should be raising our children.