Kant began to teach at the Albertina University in Königsberg in 1755, when he was thirty-one years old. He taught there for more than four decades, carrying what seems today an astonishingly heavy load. Usually he gave four or five courses each semester, meeting classes four or five hours a week. He taught logic, metaphysics, physical geography, anthropology, and many other subjects. (He even taught the rudiments of making fortifications to the officers of the Russian army that occupied Königsberg in the late 1750s.) Among his more frequent offerings were courses on ethics: He taught the subject in one form or another nearly thirty times.
(J. B. Schneewind, introduction to Lectures on Ethics, by Immanuel Kant, ed. Peter Heath and J. B. Schneewind; trans. Peter Heath, The Cambridge Edition of the Works of Immanuel Kant, ed. Paul Guyer and Allen W. Wood [Cambridge: Cambridge University Press, 1997], xiii-xxvii, at xiii [endnote omitted])
Note from KBJ: Counting this semester's two courses, I have taught ethics 52 times.
