Teaching unplugged refers to teaching without a textbook and without a lesson plan. This may sound lazy or unprepared, but there’s a method to the madness. First of all, it puts also all of the focus on the student and teacher. There is nothing in-between them. The success or failure of the class relies solely on what’s already ‘in the heads’ of the teacher and students.
It’s more akin to having a conversation. But even better, it’s a conversation a student has with a really smart person. So you can say it’s a kind of formal mentorship, in maybe an older socratic style using the “live” word. There is a fluidity and dynamism to it. The ‘live word’ is fresh, new, in-the-moment, ever changing, but always relevant.