The Substitute (2006) This film is promoted by the international department of the Swedish Film Institute

The plot is described below.
Young, ambitious teacher, Max Wejstorp - eventually the chaos at Hallonberg School becomes more than he can cope with. He asks his own old teacher, the legendary 73-year-old Folke Silvén from southern Sweden, to come to the rescue. Folke is a teacher "of the old school”; he's the world record-holder in talking backwards too. When he turns up in the Stockholm suburb of Hallonbergen things start happening.