My daughter Joanna, a Latin teacher, told me a great story from Livy. It can give us a new word for a teacher who harms students or uses them for his own ends.
This account is from Plutarch’s version. Camillus is the noble general of the Roman Republic who is besieging the Falerii:
Now, it so happened that in Falerii there was a school-master who had under his charge a large number of boys, and after their lessons were finished he would take them daily to the outskirts of the town for play and exercise. He constantly assured them that they had nothing to fear from the enemy at their walls, and they followed their master with perfect confidence wherever he chose to lead them. One day he approached the Roman advance-guard, surrounded by all the boys, whom he delivered up to be carried to Camillus. When questioned by the commander, he told who he was, and said “that he preferred the favor of Camillus to the obligations of duty, and that he had come to hand over to him the Falerian children, and through them the whole city.”
The commander was shocked at such base treachery. “War is at best a savage thing,” he said, “but it has its laws from which men of honor will never depart; though desirous of victory, they do not avail themselves of acts of villany.” So saying, he ordered the lictors to tear off the wretch's clothes and tie his hands behind him, then to furnish each boy with a rod and a scourge, with which to whip the traitor back to the city.
Meanwhile, the Falerians had heard of the fate of their boys, [146] and men and women crowded to the gates in a state of distraction, filling the air with their lamentations. Suddenly they beheld the school-master running towards them pursued by his pupils, who did not spare their blows, but shouted and yelled with delight, while they proclaimed the Roman commander “their God, their Deliverer, their Father.” The citizens were so struck by the generosity of Camillus that it was decided in council to send deputies to the noble commander to surrender the city to him. Camillus took time to consult the senate of Rome, who advised him to demand a sum of money of the Falerians, but on no account to accept anything more. Peace was then restored, and the Roman army returned home.
via The Baldwin Project: Our Young Folks’ Plutarch by Rosalie Kaufman.
Can you think of some Falerian Schoolmasters today?