“My teacher doesn’t know anything. All she does is ask questions”

Teachers ask a lot of questions, prompting a student’s comic lament:
 
“My teacher doesn’t know anything. All she does is ask questions!”
   
The comic strip Gasoline Alley, by Frank King (1883-1969), had a student say about his teacher in a September 1927 strip, “She doesn’t know so much. All she does is ask questions.” The joke, with slightly different wording, is still being included in joke books.
     
 
6 September 1927, The Bakersfield Californian (Bakersfield, CA), “Gasoline Alley” comic strip by Frank King, pg. 13, col. 8:
Father: WELL, SKEEZIX, HOW DO YOU LIKE MISS BAXTER, YOUR NEW TEACHER?
Skeezix: NOT SO WELL AS MISS BUDD. SHE DOESN’T KNOW SO MUCH. ALL SHE DOES IS ASK QUESTIONS.
 
30 August 1970, Leader-Times (Kittanning, PA), “Muggs and Skeeters” comic strip, pg. 20, col. 5:
One boy: SO YOU DON’T LIKE YOUR TEACHER?
Another boy: ALL SHE EVER DOES IS ASK QUESTIONS…
 
Google Groups: soc.culture.indonesia
refreshment for the netters
EKO SETIAWAN - DUDE!
8/31/93
(...)
Larry came home from his first day of school and told his father, “I’m not going back. My teacher doesn’t know anything. All she does is ask questions.”
   
Google Books
Harry Hill’s Whopping Great Joke Book
By Harry Hill
London: Faber and Faber Limited
2008
Pg. ?:
I really don’t like my new school. The teacher doesn’t know a thing — all he does is ask questions!
 
Google Groups: churchlady
Jest For Kids 02-23-12
Rose Bouquet
2/23/12
(...)
“I’m not going back to school ever again!” “Why ever not?” “The teacher doesn’t know a thing, all she does is ask questions!”
 
Google Books
The Bumper Book of Very Silly Jokes
Illustrated by Jane Eccles
London: Macmillan Children’s Books
2013
Pg. 211:
My teacher doesn’t know ANYTHING. All she does is ask questions.
 
Twitter
Mario
‏@_wetmedia
“im not ever going back to school ever again!”
“why not?”
“cause the teacher doesnt know anything b/c all she does is ask questions!” LOL
3:49 PM - 27 Aug 2014
 
Twitter
Mark @ MyTownTutors
‏@mytowntutors
Son: I’m not going back to school again! Mom Why? The #teacher doesn’t know a thing, all she does is ask questions! http://bit.ly/1hcc8uS
9:05 PM - 5 Aug 2015