Ms.K: Your grades have gotten steadily worse since the beginning of the term.

Ms.K: Your grades have gotten steadily worse since the beginning of the
term. Are you aware of that?
Bart: Yes, ma'am.
Ms.K: Are you aware that there is a major exam tomorrow on colonial
America?
Bart: Yes, ma'am.
Ms.K: Blah blah, blah-blah. Blah blah blah blah blah?
Bart: Yes, ma'am.
Ms.K: Blah blah. Blah-blah blah, blah blah blah.
Bart: Yes, ma'am.
Ms.K: Bart! You haven't been paying attention to a word I said, have
you.
Bart: Yes, ma'am.
Ms.K: Well, then what did I say?
Bart: Uhhhhhh... Straighten up and fly right?
Ms.K: Pah! That was a lucky guess.
-- Yes, ma'am, "Bart Gets an F"