Dewey can’t teach so he always give his students free time but some students ask he why he doesn’t teach them because they go to school to study and their parents pay a lot of money. However, he always thinks rock and he doesn’t teach his students any subjects but one day, he watches his students playing instruments well and he has good idea. He wants to make a band with his students and then he and his students start school life with rock.
First, he decides members of the band and he gives other students, who aren’t members of the band, various roles. His students don’t accept it but generally they accept it. He and his students always play instruments, sing, and learn about rock; however, Rosalie Mullins, the president of this private school, doesn’t know that they make a band and play instruments everyday.
Dewey and his students decide to take part in one contest for band. They go to the audition meeting place for taking part in this contest but it finishes. They are shocked but its director doesn’t see their performance. They think and have a good idea. They act like patient and this director sympathizes and they can take part in the contest.
Rosalie Mullins always forces her students to study hard and ask her school’s teachers to teach perfectly. She is earnest and teachers don’t ask her out with them, but Dewey asks her to go out and they drink and talk a lot. Rosalie Mullins doesn’t like festival like band because she feels pressure from her students’ parents. Dewey likes rock and wants to get opportunity to announce his band so he talks her about rock. They are in a bar and they can listen to a song. This song is Rosalie Mullins’s favorite song and she drinks so her feeling is good. Dewey asks her to give them the opportunity to announce their band’s performance and she allows it.
One day, Dewey’s friend, Ned Schneebly, gets a lot of money from one private school and he doesn’t know why he gets this money from it. This money is for Ned but he doesn’t work for this school because Dewey pretends to be Ned and work. In this time, Ned knows this fact and he is surprised and can’t believe. Dewey asks Ned not to tell this fact and Dewey goes to parents’ meeting with Rosalie Mullins. Dewey talks about his students’ parents that his students are very good. Then a security guard comes to him and he is caught. Ned tries to keep being secret of this fact but his girlfriend asks him to tell this fact. Therefore it comes out that he isn’t Ned and he doesn’t have teaching certificate. Rosalie Mullins, his students, and his students’ parents are surprised.
He lost his job and he sleeps at his home. Then his students come there and ask him to go to the contest. His students think it is unbelievable that Dewey isn’t a teacher but he teaches band so they want to take part in the contest for him. They go to the hall of the contest. Ned, Rosalie Mullins, and the students’ parents know it and they also go to the hall of the contest. Their performance is very good and comes to life. It succeeds but they can’t win. They are sad but the audience calls for an encore from them. It makes them happy and they enjoy their performance.
After the contest, Dewey can’t teach his students at the school but the students come to his house and he teaches rock and they enjoy rock music.
In this movie, Jack Black plays Dewey Finn, Mike White plays Ned Schneebly, Sarah Silverman plays Ned’s girlfriend, and Joan Cusack plays Rodalie Mullins.
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