Desirable Teacher (1981) on Netflix

Plot summary

In Rome, Pierino is a precocious but mischievous boy, older than his classmates and still repeating the year. He spends his school days playing pranks on his teachers and making jokes, and his old enemy is his teacher Mazzacurati. One of his dirty tricks makes her break an arm, so a pretty young substitute takes charge of the class. Pierino falls in love with her, and a professor falls in love with her too. Pierino has to devise jokes of his own to save the teacher. The antics continue outside school as well, in his family and in the streets where he lives.