G (face down on her desk): Uuuuugghhhhh.
Me: Just one more problem to go. You can do it. Everyone is counting on you!
G (starting to giggle): Like in Quidditch.
Me: Yes! Grab the Golden Divisor for Gryffindor!
G (laughing so hard she can barely hold her pencil): Okay.
Me: ... And she's done it! Gryffindor wins the Improper Fractions Cup.
G: Can I go start reading Goblet of Fire now?
Me: Be my guest.