That's WotN's history teacher. She's remembering her fondly along at The History Girls: 'I know she was a good teacher because she made so many of us love her classes.' Dorothy Butcher she was, and she had a good line in commenting on work. 'A few more facts about the foreign policy would not have come amiss' sort of thing.
I once had a history teacher who specialized in punishments that were unusual if not really cruel. One of our class once had to stand in the corridor with one foot in the dustbin out there. Whether that taught him anything about the Russian Revolution we'll never know.