So let’s break for a quiz: Quick, what’s the source of America’s greatness?
Is it a tradition of market-friendly capitalism? The diligence of its people? The cornucopia of natural resources? Great presidents?
No, a fair amount of evidence suggests that the crucial factor is our school system — which, for most of our history, was the best in the world but has foundered over the last few decades. The message for Mr. Obama is that improving schools must be on the front burner.
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