Liberal Davis Guggenheim and Conservative Bill McGurn can agree on one thing: Inner city public schools are broken.

For years, of course, conservatives have documented the failures that Mr. Guggenheim highlights, and in some cases have even succeeded in pushing through some good reforms. Yet that's just what gives "Waiting for 'Superman'" its potency—the indictment issues from an unrepentant liberal instead of the Heritage Foundation. I suggest to him that the kind of truths about public education he illustrates will be far more inconvenient for those in his circle than say, the friends of a former Bush speechwriter.

"I would love a union leader to see this film and say, 'I love being a teacher and I love my union but we need to get on the right side of reform,'" he answers.

Here's the trailer: