When I was an active member of the University of Florida faculty, part of our professional duty was to show up in class, on time, sober, prepared to conduct an academic and intellectual experience designed to help students learn something for the duration of the time allotted. It was called teaching.
We did it not because some administrator was walking the halls checking up to see that the faculty were doing what they were supposed to, we did it because we took our professional responsibilities seriously. And because we wanted to; we entered the professoriate because we wanted to teach, to help students expand their minds, and learn to think critically and deeply.