“What do math teachers do on Thanksgiving?”/“Count their blessings”

A Thanksgiving riddle about arithmetic/math teachers is:
 
Q: What do math teachers do on Thanksgiving?
A: Count their blessings.
 
The riddle has been cited in print since at least 2006.
 
   
Brownielocks—Thanksgiving Jokes and Riddles (November 17, 2006)
40. What do arithmetic teachers do on Thanksgiving?
Count their blessings
 
Facebook
Wishing you a safe & warm Thanksgiving!
November 24, 2010 at 12:00pm
(...)
What do Math Teachers do on Thanksgiving?
Count their blessings
 
Twitter
Bill Helton
‏@7colonel7
Corny joke…What do math teachers do on Thanksgiving?    Count their blessings!
12:41 PM - 25 Nov 2010
 
Miss Storto’s Class
What do math teachers do on Thanksgiving?
posted Nov 24, 2011, 8:00 AM by Unknown user
Count their blessings!
I am blessed to teach at a fantastic school and am thankful for my wonderful students who make me look forward to school every day. Happy Thanksgiving!
 
Twitter
Brendan Podger
‏@tintinaus
Q. What do mathematicians do on Thanksgiving?
A. Count their blessings. #makinglightjokes
2:20 PM - 24 Nov 2011
     
Miss B.‘s Classroom 
November 2012
Turkey-Time Thinking Fun (part 2)
(...)
8. What do arithmetic teachers do on Thanksgiving? (Count their blessings.)
 
Google Books
The Super, Epic, Mega Joke Book for Kids
By Whee Winn
Grand Rapids, MI: Zonderkidz
2016
Pg. ?:
What do math teachers do on Thanksgiving?
Count their blessings