Here's a good question for you: Why have public schools at all?

OK, cue the marching music. We need public schools because blah blah blah and yada yada yada. We could say blah is common culture and yada is the government's interest in promoting the general welfare. Or that children are the future. And a mind is a terrible thing to waste. Because we can't leave any child behind.

The problem with all these bromides is that they leave out the simple fact that one of the surest ways to leave a kid "behind" is to hand him over to the government. Americans want universal education, just as they want universally safe food. But nobody believes that the government should run nearly all of the restaurants, farms and supermarkets. Why should it run the vast majority of the schools - particularly when it gets terrible results?

Consider Washington, home of the nation's most devoted government-lovers and, ironically, the city with arguably the worst public schools in the country. Out of the 100 largest school districts, according to the Washington Post, D.C. ranks third in spending for each pupil ($12,979) but last in spending on instruction. Fift