Once a student threw a piece of paper in the class. It hit the teacher. Instead of getting angry, he asked the boy why he was throwing papers in classroom. The boy (untruthfully) said that he had meant to throw it into the dustbin (although he was aiming it at another boy).


The teacher (in good humour) made fun of his poor aim, and asked him to learn the story of teacher Dhronacharyya teaching Arjuna to shoot aiming at the toy bird's eye. He was asked to tell the story in the class the next day.
The boy was reformed.

The teacher was myself.