Pierino contro tutti

Pierino contro tutti also known as Desirable Teacher is a 1981 comedy film directed by Marino Girolami. The main character of the film is Pierino, an Italian variation of Little Johnny. The film was a massive success at the Italian box office, and generated a brief series of sequels in the main part nonofficial sequels including a female version of Pierino, as well as a short lived subgenre of jokefilms in which the plot basically consists in a series of jokes placed side by side.

Source: Wikipedia