evidence: Biden boasts teaching ‘political theory’ at UPenn — but he never taught a single class at the Ivy League school President Biden, who has never taught a single semester-long course at the University of Pennsylvania, mused on Thursday about when he used to "teach political theory" at the Ivy League school. [...] "I taught at the University of Pennsylvania for four years and I used to teach political theory. And folks, you always hear, every generation has to fight for democracy."