Perhaps because of the high cost of tuition at American universities, Americans typically view students as customers and schools as businesses. As such, teachers will attempt to cater to the needs of their students – if a certain process doesn’t interest the customers (students), the teacher will change it in order to keep the customers attentive.
During their classes, if American teachers notice that students aren’t paying attention, they will often include several amusing anecdotes that they tell throughout the class to keep their students’ focus.
For example, during a physics class, it would not be uncommon for an American professor to stop the lecture to talk to students about how Herman Weyl (one of the early proponents of group theory) had an affair with Erwin Schrodinger’s (the physicist who’s best known not only for his quantum mechanics equation but also for his potentially dead cat) wife, or how Murray Gell-Mann (who won the 1969 Nobel Prize in physics) was so narcissistic that he once warned his cab driver not to cash his check, because he believed that his signature was worth more than his cab fare had been.
American teachers will also include anecdotal stories from their own lives if these stories have any relevance to the subject matter.