If you are an Egyptian student and you don't like your Christian teacher, it is easy to get rid of her.
A Coptic teacher employed at a state school was arrested for supposedly saying "Wipe this shit off the blackboard" referring to a Sura from the Quran from the previous Islamic Studies class.
The kids complained to their parents who went to officials in the education department. Eventually this reached the head of the Minya governate who contacted security authorities. An investigation is underway and apparently the teacher has been suspended, so far.
The accusation seems highly unlikely. Copts have a sense of self-preservation. No teacher is that dumb to insult the Koran in a Muslim-majority classroom.
(h/t Ibn Boutros)
This story originally said that it happened in Jordan. I regret the error.