What about pre-kindergarten?
I think it is a bad idea. The earlier a child is exposed to ideas that are contrary to what you want him to learn the more likely he is to embrace those ideas.
Let's face it. Most parents are very capable of teaching their children the basics of reading, math, spelling and social skills. They certainly should be the ones teaching their children religion, morals, and ethics.
Pre Kindergaten is another ploy to put children under the influence of government schools at an early age. You can be certain that what they learn aside from what a parent could teach will be the likes of inappropriate sex education, tolerance for amoral and immoral behavior, relativism and mockery of God and Country.
So I refuse to fall for the claim that Pre K is needed to advance our children's place in the world.