I recommend making a game of it. In both high school and university my friends and I had much fun finding weird traits and ticks of various teachers and professors and joking about them.
We had a teacher would used the word "Okay" way too much. Okay, like, 2-3 times in a sentence, okay?
In uni we had a prof who did three big things: 1- she compulsively adjusted her head-scarf, 2- she used the word "salient" instead of "important", and 3- she always used the phrase "in terms of", in times where it was stupid and redundant (e.g. "You'll need a pen, in terms of writing." What else would I need my pen for?)
It can make the time pass quicker and more humorously if you and a cadre of your friends/classmates know about the trait and smile about it.
It's not nice, admittedly. A lot of people can't control those things. But when your teacher/prof is a pain, it helps.
-Sparks Nevada, Marshal on Mars
"Who cares what evil lurks in the hearts of men!"
"Unless evil's carrying the Martini tray, darling."
-Frank and Sadie Doyle