I am afraid that the schools will prove the very gates of hell, unless they diligently labor in explaining the Holy Scriptures and engraving them in the heart of the youth. -Martin Luther
Whilst this might be true, and we attribute that to be partly why the morals of society is in a downward spiral, I think we have to keep in mind also that God chooses whom He will, because He is very much entitled to.
Probably “Christian” schools or states, where Christianity is imposed/forced on all, might not necessarily be the best way. (Not saying that all Christian schools or states are like that though.) But Christianity as a real restored relationship with God through Jesus Christ must not be forced onto people, but explained to the layman for them to understand and, God willing, accept this gift for themselves.