Hermione's secret

Hermione reveals to Harry how she has been attending two classes at once

Extract from Harry Potter Prisoner of Azkaban

by J.K. Rowling

'It’s called a Time-Turner,’ Hermione whispered, ‘and I got it from Professor McGonagall on our first day back.

I’ve been using it all year to get to all my lessons. Professor McGonagall made me swear I wouldn’t tell anyone. She had to write all sorts of letters to the Ministry of Magic so I could have one.

She had to tell them that I was a model student, and that I’d never, ever use it for anything except my studies ... I’ve been turning it back so I could do hours over again, that’s how I’ve been doing several lessons at once, see?

Harry Potter Prisoner of Azkaban

BY J.K. Rowling