Lisa displays Arnold's award-winning painting "Nude at a Filling Station" in their bedroom. Hanging in the principal's office is "Nude at a Watering Trough". "Nude at a Flower Pot" is another of Arnold's six nudes.
Sam Drucker is the outgoing school board president. He says he's been "schoolboarding" for 27 years.
The teacher orders Arnold to stay after class and write "I will not forget my notebook" 100 times on the chalkboard.
The allusion to student unrest on college campuses speaks to a recurring theme in this season of Green Acres (1965), this being the third episode in which mention is made of riots and protests by students. The first instance occurs in Beauty Is Skin Deep (1969); the second in Rest and Relaxation (1970).
Lisa asks Oliver, just made president of the school board, whether he wants to dunk his cookies in milk, claiming "the fellow in the Whitehouse is a dunker." She's alluding to Richard Nixon, who was the U.S. President at the time this episode originally aired.