(SpongeBob announces he'll be coming back to Boating School for another year. Mrs. Puff thinks to herself whilst also sweating out of nervousness.)
Mrs. Puff: (Internally) Oh, Neptune! Another year with him. Barnacles! Dirty Barnacles! I've gotta do something to save myself! There's only one way out... A teacher's ace in the hole.
(Mrs. Puff is no longer speaking internally to herself.)
Mrs. Puff: Extra credit!!