“My son goes to a private school. He won’t tell me where it is!”

New York-based stand-up comedian Rodney Dangerfield (1921-2004) told a joke about private school:
 
“My kid drives me nuts. For three years now he goes to a private school. He won’t tell me where it is.”
 
It’s not known when Dangerfield first told the joke, but it was included in a “My Favorite Jokes” feature in Parade magazine on August 24, 1975.
 
 
Wikipedia: Rodney Dangerfield
Rodney Dangerfield (born Jacob Cohen, November 22, 1921 – October 5, 2004) was an American stand-up comedian, actor, producer and screenwriter known for the catchphrase “I don’t get no respect!” and his monologues on that theme. He is also remembered for his 1980s film roles, especially in Easy Money, Caddyshack, and Back to School.
   
24 August 1975, Boston (MA) Sunday Globe, “My Favorite Jokes” by Rodney Dangerfield, Parade magazine, pg. 19, cols. 1-2:
My kid drives me nuts. For three years now he goes to a private school. He won’t tell me where it is.
 
Google Books
Roast of the Town
By Joey Adams
New York, NY: Prentice Hall
1986
Pg. 36:
Rodney told me, “My son goes to a private school — I’ve been trying for years to get him to tell me where it is.”
 
Google Books
Dad, This Joke’s for You:
The Best Dad Jokes from the Funniest Comedians
Edited by Judy Brown
Portland, ME: Ronnie Sellers Gift Books
2004
Pg. 50:
My kid drives me nuts. For three years now he goes to a private school, he won’t tell me where it is. -RODNEV DANGERFIELO
 
Twitter
Nick Wilsdon‏
@nickwilsdon
Replying to @brianclark
@copyblogger “My kid goes to a private school, he won’t tell me where it is.”
3:21 AM - 26 Jul 2008
 
Twitter
ANTHONYTILGHMAN‏
@AnthonyTilghman
my Kid Is Driving me Nuts, 3 years he tells me he’s going 2 private school. He Won’t tell me where it is. Rodney Dangerfield
10:30 PM - 12 Jul 2010
 
Google Books
A Tribute to Teachers:
Wit and Wisdom, Information and Inspiration About Those Who Change Our Lives
By Richard Lederer
Portland, OR: Marion Street Press
2011
Pg. ?:
My son drives me nuts. For three years now, he goes to a private school. He won’t tell me where it is. -RODNEY DANGERFIELD
       
YouTube
vintage Rodney Dangerfield comedy 1978
robatsea2009
Uploaded on Apr 15, 2011
Some vintage Rodney Dangerfield, in performance in 1978.
2:40
“My kid, he drives me nuts. Over three years now he goes to a private school. He won’t tell me where it is!”
 
Twitter
More
Rodney Dangerfield Retweeted Reddit
“My kid, he drives me nuts. For 3 years now he goes to a private school. He won’t tell me where it is.”Rodney Dangerfield added,
RedditVerified account @reddit
#AskReddit: Parents, what’s the best lie your child has told you that you knew was a lie? http://redd.it/4zr3lt 
4:22 PM - 27 Aug 2016