Once in a Lifetime (original title: Les Héritiers) is a 2014 French drama film directed by Marie-Castille Mention-Schaar.
Based on a true story, the film chronicles the relationship of a teacher with teenagers who have long since dropped out of the school system. This teacher of Leon Blum high school at Créteil (Val-de-Marne), decides to enter a national competition titled "Children and adolescents in the Nazi concentration camp system". Initially tumultuous and frustrating, the atmosphere quickly evolves as they meet with a survivor of the camps and increasing intensity during a visit to a museum dedicated to this period of history. This experience will change their lives.
Karen Schollemann called the film on kinocritics.com a "powerful tale about integration".