Dewey Finn, wannabe rock star, decides to earn some cash by posing as a substitute teacher at a prep school. There, he turns the straight-A pupils into a mind-blowing rock band. But can he get them to the Battle of the Bands without parents and the headmistress finding out? Based on the Paramount movie by Mike White. Book: Julian Fellowes. Lyrics: Glenn Slater. New Music: Andrew Lloyd Webber. If you are looking for not just a musical, but one of the best comedy shows at the Fringe, look no further ***** (DeadlineNews.co.uk).