This is a very useful textbook on teaching argument. Given that most undergraduate students have composition courses specifically on teaching argument, I am surprised that many of them after taking such courses still don't know how to construct an argument. Anyway, if I were to teach advanced courses in humanities, I will make sure to include this book as a selective reading, just in case they need to re-learn how to make an argument. I will suggest this to any professors in science and in humanities to refer their students to this book if you sense they don't really know hot to construct an effective argument.
As a graduate student at Penn State University, I used this text while teaching freshman English. I recall it being adequate to the task at the time but did not appreciate its usefulness as a resource for teaching rhetoric until many years later.