Trivia: At one point in developing Season/Series 2, the character Chang was going to have a radically different storyline. It was originally going to be revealed that he had a twin that he had eaten or absorbed while inside of his mother's uterus. He was then going to have visions of this deceased twin that would torment him and act as his "evil side." This idea was dropped, presumably for being too dark and too strange.
Advanced Gay - S3-E6
Trivia: Larry Cedar plays Chevy Chase's father in this episode, even though in real life he's only 12 years older.
Trivia: According to Dan Harmon, a lot of Chevy Chase's dialogue in the series was based on things he actually said behind-the-scenes. He'd say something odd or nonsensical in conversation, Harmon and the writers would jot it down, and then they'd add it to the scripts during rewrites.
Trivia: When Shirley is the Captain in their sailing class, the collar device on her lapel is two silver bars. While that is the collar device of an Army Captain (O-3), it is only a Lieutenant in the Navy. A Navy Captain is an O-6 and wears a silver spread-eagle on their collar device.
Answer: The implication is that Jeff will still be teaching at Greendale after Annie and Abed leave. As for who became vice dean? It's never shown, since it's not really important to the series.
TedStixon