But if you follow the fevered lamentations over the Common Core, look hard at some of the complaints from parents and teachers, and factor in the modern cult of self-esteem, you can guess what set Duncan off: a concern, wholly justified, that tougher instruction not be rejected simply because it makes children feel inadequate, and that the impulse to coddle kids not eclipse the imperative to challenge them.

The Common Core, a laudable set of guidelines that emphasize analytical thinking over rote memorization, has been adopted in more than 40 states. In instances its implementation has been flawed, and its accompanying emphasis on testing certainly warrants debate.

What’s not warranted is the welling hysteria: from right-wing alarmists, who hallucinate a federal takeover of education and the indoctrination of a next generation of government-loving liberals; from left-wing paranoiacs, who imagine some conspiracy to ultimately privatize education and create a new frontier of profits for money-mad plutocrats.

Then there’s the outcry, equally reflective of the times, from adults who assert that kids aren’t enjoying school as much; feel a level of stress that they shouldn’t have to; are being judged too narrowly; and doubt their own mettle.

Aren’t aspects of school supposed to be relatively mirthless?