Which Hogwarts subject does Remus Lupin teach in J.K. Rowling’s third Harry Potter novel?

Remus Lupin teaches Defence Against the Dark Arts in J.K. Rowling’s third Harry Potter novel, Harry Potter and the Prisoner of Azkaban. He becomes the subject’s professor at Hogwarts during Harry’s third year and is widely regarded by the students as one of the school’s most effective teachers.

Lupin’s lessons include practical encounters with dangerous magical creatures, such as the boggart exercise that helps students confront personal fears. His calm teaching style and personal understanding of dark magic make him an important mentor to Harry.

Lupin is also a werewolf, a fact that becomes central to the novel’s later events. He resigns from Hogwarts after his condition is exposed, even though his teaching has been successful. Defence Against the Dark Arts is distinct from subjects such as Charms, Potions, and Transfiguration, each taught by different professors at various points in the series.