It is about a music school in Philadelphia, The Paul Green School of Rock Music, run by Paul Green that teaches kids ages 9 to 17 how to play rock music and be rock stars. Paul Green teaches his students how to play music such as Black Sabbath and Frank Zappa better than anyone expects them to by using a unique style of teaching that includes getting very angry and acting childish.
Montage reads the films you've rated and works out how this one lands for you. Free, and about two minutes.
