Today, they suffered three quarters of an hour's droning on the subject of giant wars. Harry heard just enough within the first ten minutes to appreciate dimly that in another teacher's hands this subject might have been mildly interesting.
Professor Binns was the only ghost teacher, and the most exciting thing that ever happened in his classes was his entering the room through the blackboard.
Slytherin wished to be more selective about the students admitted to Hogwarts. He believed that magical learning should be kept within all-magic families.
The four school houses are named after them: Godric Gryffindor, Helga Hufflepuff, Rowena Ravenclaw and Salazar Slytherin.
Professor Binns raised his eyes from his notes, looking amazed, as always, to find the room in front of him full of people.
Professor Binns had been very old indeed when he had fallen asleep in front of the staff-room fire and got up next morning to teach, leaving his body behind him.
My subject is History of Magic. I deal with facts, Miss Granger, not myths and legends.
Professor Binns was looking at her in such amazement, Harry was sure no student had ever interrupted him before, alive or dead.
Professor Binns opened his notes and began to read in a flat drone like an old vacuum cleaner until nearly everyone in the class was in a deep stupor, occasionally coming round long enough to copy down a name or date, then falling asleep again.