Klassen is a Danish television series broadcast since 2016.The series depicts the school life of a class of a Danish folkkole, whose students spend their time making their life difficult, except often to get impatient on their own initiative, with half-way methods between psychological confession and self-consciousness, and then to find at the end, after all the traverses, a spirit of unity.The seasons of the series are mainly organized into groups of two (I with II, III with IV, etc.): to each couple of seasons the actors are generally different, the problems often faced however (the adolescent love, the relationship with parents and with adults in general, friendship,...) as well as some figures representing typical characters.The series is accompanied, starting from the 6th season, by some "extra contents" ("Klassen Extra"), and by two minor series, conceived in the manner of a traditional television series ("Jjussens" in the 24th century.