It's been a while, But when my kids were in Christian school, the annual bill per child was $3000. At the time the state was spending $10k per child.
Furthermore when I fell on hard times and my kids had to go to public school, it was a full two years before they 'dumbed down' to be even with the state's curriculum.
Eye-opening. I would simply NOT have my kids in public school anymore. Especially now that home schooling options have blossomed.