“Rock School” (R )

What it’s about: A “School of Rock” documentary about Paul Green, the foul-mouthed, self-proclaimed “uberlord” of the Paul Green School of Rock Music, a man who berates children into being all that they can be.

Worth watching? **

“Watching these undersized guitar gods wield their instruments can be a thing of beauty. But that doesn’t make for a movie. Neither does simply presenting us with a juvenile man-child who freely drops F-bombs to elementary-age kids . . . and then just letting it go at that. That’s lazy filmmaking.”