“Why was the music teacher angry?”/“Because the kids were always passing notes.”

A music teacher riddle was posted on Twitter by LITTLE MISS PATATAS on June 18, 2010:
   
Q: Why was the music teacher angry?
A: Because the kids were always passing notes.
 
The joke has also been posted in one-liner form. “The music teacher got irritated because her students kept passing notes” was posted on Reddit—Oneliners on October 27, 2019.
   
   
Twitter
LITTLE MISS PATATAS
@iamjanemariano
Why was the music teacher angry? Because the kids were always passing notes 😛
6:15 AM · Jun 19, 2010·Twitter Web Client
     
Twitter
🧟‍♀️
@braiinst3w
Why was the music teacher angry?……… The kids were always passing notes xD
7:03 PM · Nov 23, 2011·twicca
   
Twitter
Holaa.
@Its_All_Jokes
Why was the music teacher angry? The kids were always passing notes.
11:44 PM · Jan 20, 2012·Twitter Web Client
   
Twitter
laura
@lozsuckss
‘I did a curse once on my music teacher,  he chucked me out for passing notes’ ‘what kind of notes?’ ‘B flat and a semi quaver’ Mr.Chuckle♥
10:08 AM · Feb 28, 2012·Twitter for BlackBerry®
   
Twitter
Book Lab~~
@DarkwolfALA
Replying to @Gage_Panther
Music Teacher: Are you passing notes in class?! >:c
4:23 AM · Aug 22, 2017·Twitter Web Client
 
Reddit—Oneliners
Posted by u/PulkPush October 27, 2019
The music teacher got irritated because her students kept passing notes.
 
Twitter
Kids and life hacks
@guys_and
The music teacher got irritated because her students kept passing notes.
12:24 PM · Oct 27, 2019·IFTTT