Uproarious comedy showcases Jack Black as an egomaniacal heavy metal guitarist who gets booted out of his band, then has to seek employment in order to make ends meet. Black poses as a substitute teacher at a snooty prep school where, after teaching the kids a few things about real rock music, he helps them form a high caliber band. With Joan Cusack, Mike White, and Sarah Silverman; directed by Richard Linklater. 109 min. Widescreen; Soundtrack: English.