“How do you get a parrot to talk properly?”/“Send him to polytechnic.”

A “polytechnic” is not full of parrots (Pollys, as in “Polly want a cracker?”), but there’s a riddle:
 
Q: How do you get a parrot to talk properly?
A: Send him to polytechnic.
 
The joke has been cited in print since at least 2007.
 
   
Klosi Jokes 
Category: Bird jokes
Date Added: 11/10/2007
Joke: How do you get a parrot to talk properly ? Send him to polytechnic !
   
African Grey Parrot Centre (AGPC)
10 Bird Jokes To Make You Chortle
February 16th, 2009
(...)
How do you get a parrot to talk properly ?
Send him to polytechnic !
 
Twitter
Bollywood Sargam‏
@bollywoodsargam
Bird jokes - 1529 Joke: How do you get a parrot to talk properly ? Send him to polytechnic ! .... http://bit.ly/1pr4u
2:40 AM - 11 Sep 2009
   
3 January 2013, The Sun (London, UK), “Daily Smile LOL,” pg. 22:
HOW do you get a parrot to talk properly? Send him to a polytechnic.
     
Pan American Graphic, Inc.
Anyone know any parrot jokes?
Posted at： 2014-06-29　
(...)
Q: How do you get a parrot to talk properly? A: Send him to polytechnic!
 
Twitter
Lucky Score‏
@LuckyScoreNet
How do you get a parrot to talk properly ?
Send him to polytechnic !
#Joke from #BirdJokes in #Jokes, #Humor and #Satire
11:40 AM - 22 Oct 2017