evidence: Fact Check: Did Joe Biden Teach Political Theory at University of Pennsylvania? President Joe Biden on Thursday claimed that he taught 'political theory' at the University of Pennsylvania. The 80-year-old was speaking at Prince George’s Community College in Maryland. [...] During his speech, Biden said that he 'taught at the UPenn for four years'. "I used to teach political theory. And folks, you always hear, every generation has to fight for democracy."