You perform every spell flawlessly, and perform a spell that's more advanced than what you're taught, and you demonstrate perfect understanding of the subject.
One, in Defence Against the Dark Arts because of the DA
limgardiean leviosa
Amycus Carrow, a Death Eater, is the Defence Against the Dark Arts teacher.
Gilderoy Lockhart was the Defence Against the Dark Arts teacher in Harry Potter and the Chamber of Secrets.
Gilderoy Lockhart played the Defence Against the Dark Arts teacher, in Harry Potter's second year at Hogwarts (Chamber of Secrets).
Dumbledore's Army (DA)
Severus Snape (the D.A.D.A. teacher in Harry Potter's 6th. year).
Remus Lupin, The Defence Against the Dark Arts teacher in The Prisoner of Azkaban
yeah she is! you can see her in defence against the dark arts, potions and the great hall!
Amycus Carrow. Although it was more of a Dark Artsclass.
You have Quirrell, Lockhart, Lupin, Moody, Umbridge, Snape, and Carrow
in the defence against the dark arts classroom, i think, because previously, all of the others have. ( i think)