“What kind of school does a carpenter go to?”/“Boarding school.”

“Boarding school” is the subject of an obvious pun:
 
Q: What kind of school does a carpenter go to?
A: Boarding school.
   
The joke has been cited in print since at least 2003.
     
“Flight attendants go to boarding school” and “What kind of school do surfers go to?”/“Boarding school” are similar “boarding school” jokes.
     
 
Wikipedia: Boarding school
A boarding school is a school where pupils live within premises while being given formal instruction. The word “boarding” is used in the sense of “room and board”, i.e. lodging and meals. As they have existed for many centuries, and now extend across many countries, their functioning, codes of conduct and ethos vary greatly. Children in boarding schools study and live during the school year with their fellow students and possibly teachers or administrators. Some boarding schools also have day students who attend the institution during the day and return home in the evenings.
   
Google Groups: alt.humor.puns
Puns of the Weak 1-31-03
Stan Kegel
1/31/03
(...)
What kind of school does a carpenter go to?
Boarding school. (Daily Groaner)
 
Google Books
Greatest Goofiest Jokes
By Terry Pierce
Illustrated by Buck Jones
New York, NY: Sterling Publishing Company, Inc.
2005
Pg. 46:
What kind of school do carpenters attend?
Boarding school.
 
Google Groups: Sailor’s Clean Humor
Saturday eve Clean
stewburner
9/6/08
(...)
What kind of school does a carpenter go to?
Boarding school.
 
Twitter
Daily Groaner
‏@DailyGroaner
Q: What kind of school does a carpenter go to? A: Boarding school. #jokes #humor #funny
1:58 PM - 17 Apr 2012
 
Twitter
Arvis Brackeen
‏@geeimshort
What school did the Carpenter go to before high school?
Answer: Boarding School
#CornyJokes
12:01 AM - 3 Dec 2015
 
Twitter
Michael Husada
‏@HusadaMichael
Where did the carpenter go to study?
A boarding school, wood you believe?
7:33 AM - 26 Feb 2016