Must be something funny in the water in San Diego. Back in the 1990s, when it was widely seen as one of the best urban districts, the San Diego business community decided it was no good and needed a tough master to bring it to heel. So they hired Border Czar and attorney Alan Bersin as superintendent, and he launched controversial, pedal-to-the-floor reforms that I wrote about in “Death and Life of the Great American School System.”

I visited San Diego a few times since, and on one visit spent a morning in an exemplary elementary school. The principal was Cindy Marten. The district was very proud of her. Justly so, it was a terrific school.

On my next visit, Cindy was suddenly superintendent. A few weeks ago, I wrote a post on why I thought San Diego was the best urban district in the nation. I specifically said it was not about test scores, though they are good, but about vision and teamwork.

Of course, this prompted a local journalist to complain that the San Diego schools were awful, awful. What a negative reaction. Imagine if you say to a mother, “That baby of yours is beautiful,” and she yells back, “She is not!” Like people who can’t take yes for an answer.

So an editor at Voices of San Diego, where the snarky article appeared, invited me to respond, and this is what I wrote.