"How many teachers does it take to screw in a…

There have been several teacher versions of the traditional lightbulb joke. This is from 1990:

Q: How many teachers does it take to screw in a light bulb?
A: One if at home, but on school time, four.

This is from 2009:

Q: How many teachers does it take to change a light bulb.
A: Teachers don’t change light bulbs, but they can help make a dim one brighter!

This is from 2012:

Q: How many teachers does it take to change a lightbulb?
A: None, that’s what students are for.

Google Groups: rec.humor
Lightbulb jokes -summary (LONG)
Ronald van Loon
3/22/90
(...)
How many teachers does it take to screw in a light bulb?
One if at home, but on school time, four.

Google Groups: rec.humor
Light Bulb Jokes
Chris Schulman
9/1/93
(...)
Q: How many teachers does it take to screw in a light bulb?
A: If at home, one, but on school time, four.

Google Groups: rec.humor
How many teachers
Merv
2/22/01
How many teachers does it take to change a light bulb?
Forty-three.
Two to screw in the bulb and 41 to whine it was an extra-curricular activity.

Twitter
❤️ FizzyDuck ❤️
@FizzyDuck
Q: How many teachers does it take to change a light bulb ?A: Teachers don’t change light bulbs but they can help make a dim one brighter!
4:29 PM - 27 May 2009

Twitter
Damilola Shobo
@damilolashobo
how many teachers does it take to screw in a light bulb? none, the student does it for them!!!
3:33 PM - 18 Nov 2011

Twitter
George Carlin
@GeorgeCarIin
How many teachers does it take to screw in a light bulb? “They don’t screw in light bulbs; they’re too busy molding tomorrow’s wage-slaves!”
8:57 PM - 9 Apr 2012

Twitter
Daniel Miles
@thecoolmanbro
How many teachers does it take to screw in a lightbulb. None that what the students are for.
11:35 PM - 30 Dec 2012

Twitter
Living In Singapore
@livinginsg
How many teachers does it take to change a light bulb?
None, they give it as homework to the students.
11:17 AM - 12 May 2013

Reddit—Jokes
How many teachers does it take to solve algebra?
submitted March 18, 2016 by ChippersRevenge
None, that’s what students are for.

Twitter
Aerin Night
@AerinNight
Q: How many teachers does it take to change a lightbulb?
A: They don’t change the bulbs, but good teachers can make the dim ones brighter!
11:22 PM - 1 Apr 2016

Reddit—Jokes
How many teachers does it take to change a lightbulb?
submitted May 13, 2016 by whoisthisagain
Well I’m not just going to tell you. You need to figure it out yourself.

Reddit—Jokes
How many teachers does it take to change a lightbulb?
submitted August 10, 2016 by ThereAintNoValley
None, that’s what students are for.

Reddit—Jokes
How many teachers does it take to screw in a lightbulb?
submitted April 20, 2018 by petardpan
None, it’s not on the state standardized test and light bulbs aren’t in the budget.

“How many teachers does it take to screw in a lightbulb?” (riddle)