A French film is about a teacher and a group of naughty boys. The teacher is a bald old man. What's the name of this movie? !

Spring in Cowboy Class (formerly known as Chanter) is a film directed by christophe barratier. It tells the story of Pierre Morhange (jacques perrin), a world-famous conductor, returning to his French hometown to attend his mother's funeral. His old friend (didier flamand) gave him an old diary. Looking at this diary left by the first music teacher, Clemente Matthew (Gerald Juno), Pierre slowly savored the teacher's state of mind, and childhood memories surfaced in his own memory.