This 2015 Otto Waalkes film is a comedy/horror. It features similar humor as Scary Movie meets Napoleon Dynamite, for reference.
Besides Otto, many of the cast have only ever been in this film, or have been in very few films, such as Fack ju Göhte or other comedies.
There are some good topics here: school expectations (from self, staff, and parents), social expectation and consequences when one doesn’t reach them, use of quarantines… Clips only would be a great way to make these teachable moments happen.
There are some interesting descriptions of sex during the “penis” game (during which classmates see who can get away with saying “penis” during class…). This takes place in one of the first scenes of the film. There is some homophobic humor used in this film. It also probably uses the “F” word (in both languages) enough to earn it an R rating in the U.S.