Instead, Chhuon prevented his people from starving by showing them how to hide food. He hid fugitives and lied to the soldiers about their whereabouts. He personally entered a prison to plead for the life of one of his villagers... and took him home

It is true that A hero is a man who does what he can... it is also evident that a hero is compassionate. However a survivor is the one who remembers it forever.

Awesome lessons for your students, they must be glad learning from you

Nelson Mandela is another hero you can look into