Watching this silly, formulaic movie may be the most fun I've had in a theater this year. Jack Black plays Dewey Finn, a variation of the character he played in High Fidelity — or, if you prefer, a cleaner version of the character he plays in his band, Tenacious D. — a guy whose unnatural desire to rock drives everything else he does. To pay his overdue rent, he poses as his roommate, a substitute teacher, and takes a long-term assignment at Horace Green Elementary. When he discovers that the kids in his class can play instruments, or at least classical music, he decides to toss the curriculum and transform the class into his backup band for the local Battle of the Bands, unbeknownst to anyone outside the classroom.
Yes, it sounds ridiculous, but despite the predictability of the plot and the softness of the satire, the movie is alive and funny, all the way through. It stays fresh where most movies like this have at least a few moments of tedium. The trick is the attention to character detail: the teachers are appropriately skeptical of Finn's claims, the kids have distinct personalities, and Finn speaks to them as if they're adults, or at least teens, which says more about him than it does the kids. Jack Black's energy is boundless — he's more like Yosemite Sam than John Belushi — and Joan Cusack is funny in a role that could be annoying, the uptight principal. An egalitarian spirit takes over the class, and I found myself rooting for each of the kids to shine. There's a scene in which a girl, at the last minute, won't perform because she's afraid she'll be laughed at, and the teacher tries to convince her that her voice will win everyone over. It's a necessary complication in the plot, but a key to the movie's success is that I really believe what these two people are saying. By taking such moments seriously, director Richard Linklater and screenwriter Mike White (who also plays Finn's roommate) honor a genre that you'd think would be spent by now, just as Finn idolizes the monsters of rock. Rather than dampening the humor, such attention enhances it because the audience isn't asked to care about cardboard cutouts. My one regret is that Sarah Silverman is underutilized as the roommate's domineering girlfriend, but a movie about stickin' it to the Man needs a few straw men to set ablaze, even if some of them are women.