Grrr........

She was making them clean the classroom. Did she look like a house elf?! Cleaning up her own mess was one thing, she had to do that at home anyway. But cleaning the classroom meant cleaning someone else's mess. And there in lie her whole problem with this lesson. She wasn't a house elf, maid, or anyone's mother, so it was unfair to expect her to clean a whole room. Not that she would be doing it by herself, but it was the principal of it all.

Still, Sky wasn't going to give the mean woman the satisfaction of leaving class. Instead, she got up and walked over to a section of the floor. "Scourgify." A spell that she could do in her sleep. Which meant that practice wasn't needed at all. "Poliotus." A spell that she apparently didn't need to practice either, as the section of floor she'd just cleaned became perfectly polished.