Education, it is said, is lighting a fire, not filling a bucket. The word comes from the Latin for “educe,” lead forth. Learning isn’t about downloading a certain quantity of information into your brain, as the proponents of online instruction seem to think. It is about the kind of interchange and incitement—the leading forth of new ideas and powers—that can happen only in a seminar. (“Seminar” being a fancy name for what every class already is from K–12.) It is labor-intensive; it is face-to-face; it is one-at-a-time.