It's cool, I sensed no snark.

(and welcome lurker!) Yes, what AnotherKD said. We had nuns who taught, one priest who taught an advanced theology class (I didn't take it), and one woman who was a self-described "lay person." She was divorced, had a daughter, so couldn't become a nun. But she took a vow of celibacy and poverty anyway, so I guess that's what defined her as "lay." I don't think many (if any) of the other teachers would consider themselves lay people. Just teachers.