les choristes

 Les Choristes is a 2004 French movie directed by Christophe Barratier.

"Widely successful orchestra conductor Pierre Morhange (Jacques Perrin) returns to France when his mother dies. 
He reminisces about his childhood inspirations through the pages of a diary kept by his old music teacher Clément Mathieu (Gérard Jugnot). 


In 1949, a young Pierre (Jean-Baptiste Maunier) is the badly   behaved son of single mother Violette (Marie Bunel). He attends a boarding institution, Fond de L'Etang ("Bottom of the Pond"), for "difficult" boys presided over by strict headmaster Mr. Rachin (François Berléand). New teacher Mathieu brightens up the school and assembles a choir, leading to the discovery of Pierre's musical talents and a transformation in the children. "------resource from Wikipedia   .

Clement Mathieu taught the boys how to sing and slowly changed them. The movie is touching in the end when Clement left the school and saw letters flowing out the window on which wrote his students' words and their scrawls.    

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