My 3 children went to a Christian school for their elementary years. 2 of them are living the Christian life. In my opinion the home is far more important than the school. Inconsistency by the parents will have a greater effect.
Tammy Faye gave a most appropriate favorite Bible verse several days ago. Romans 8:28 "And we know that all things work together for good to them that love God, to them who are the called according to his purpose." Also she said she knew she was going straight to heaven.