Not much, unless your student has a massive guilt complex for never having done her homework.
Yesterday was the last lesson of a 30-hour course for "Brigitte", a project manager who works for a local IT company.
Each week she had a homework assignment
to complete. And each week she'd arrive with apologies of all sorts.
So five minutes before the end of yesterday's class, she excused herself from the room only to come back with a chilled bottle of Cerdon sparkling wine.
We drained half the bottle in record time, discussing the beauty of this hilly and picturesque region halfway between Lyon and Geneva on the western edge of the Jura (Ain Department).
We talked about visiting the caves, walking through the verdant canyons and touring the vineyards that produce this wine.
I first went to Cerdon in 2008 to climb the rocks towering over the valley. You can find out more about climbing in the region from the book Roc'in Bugey
that you can buy on-line here.
It was a day of firsts, then - never before had I indulged in the bubbly during a lesson, but it went down too cool and refreshing to stop, like sipping sweet, liquid rubies.
And never before had I stayed so long after the end of a lesson. I'm usually very draconian about leaving exactly on time.
But as the makers Lingot-Martin say of their sparkling wine, its aromas of red fruit and subtly sweet bubbles make it a drink of delight and celebration.
Who wants to rush away from that?
If only more students offerered wine or the equivalent when they don't do their homework, I might be forced to re-think my opinion about teaching for a living.