In Harry Potter and the Goblet of Fire , Professor Dumbledore announces the new Defense Against the Dark Arts teacher after sorting the Hogwarts students .
Hermione , angry at this injustice , forms a society to promote the rights of house elves known as S.P.E.W . ( Society for the Promotion of Elvish Welfare ) .At Hogwarts , Professor Dumbledore announces that Alastor `` Mad-Eye '' Moody will be the Defence Against the Dark Arts teacher for the year , and also that Hogwarts will host the Triwizard Tournament , with a prize of one thousand gold Galleons .
Harry Potter and the Goblet of Fire