Hurrah, the School Is Burning
Hurra, die Schule brennt (original)
A new teacher, Dr. Dr. Bach, is transferred from his quiet village elementary school to the Mommsen Gymnasium, bringing along his nephew Jan. Bach's lackadaisical methods raise the suspicions of the other teachers.
Starring Hansi Kraus, Peter Alexander, Heintje Simons, Theo Lingen, Gerlinde Locker, Werner Finck, Rudolf Schündler, Ruth Stephan, Hans Terofal, Carola Höhn
It's a comedy and musical movie, and has a rating of 5 out of 10 from Imdb which is fairly low for this kind of movie.
Watch it here
Not found streaming from Denmark.