You were the new Defense Against the Dark Arts teacher, and you were busy trying to get the class to settle down and pay attention.

You were supposed to be teaching them how to defend themselves against Boggarts. But obviously that wasn't working, the only one who was actually paying attention to you was Hermione.

After a while you finally managed to get the students to calm down and you went on about the lesson, but you still heard some mischievous giggling.

Then Crabbe raises his hand, you sigh and call on him.