“Dog obedience schools have grades K - 9”

“K-9” can mean “canine” (a dog). “K-9” can also mean “kindergarten-9th grade.”
   
“My dog training school teaches grades K-9” was posted on Twitter by Jimini Jon Goulash on August 31, 2015. “Just found a great dog school… They teach grades K-9” was posted on Reddit—Dadjokes on December 10, 2017. “Dog obedience schools have grades K - 9” was posted on Twitter by Bob Golen on April 29, 2022.
   
 
Twitter 
Jimini Jon Goulash
@yolkbae
My dog training school teaches grades K-9
4:14 AM · Aug 31, 2015·Twitter for iPhone
   
Twitter
Cody Miner
@acodyminer
My dog’s obedience school is rigorous. In order to graduate, they must complete grades K-9.
10:38 PM · May 29, 2017·Twitter for Android
 
Twitter
A Shot of Steve™ ⚡️
@SteveKoehler22
When we took our dog to obedience
school, I was expecting a small class.
Imagine my surprise when I saw the
range of ages .... K-9.
6:19 AM · Aug 4, 2017·Twitter for iPad
 
Reddit—Dadjokes
Posted by u/7tacoguys December 10, 2017
Just found a great dog school…
They teach grades K-9
   
Reddit—Jokes
Posted by u/overkoalafried February 28, 2019
How many grades are in dog school?
Grades K-9
   
Reddit—Dadjokes
letsgetrandy December 28, 2021
Interestingly, dog schools only have grades K-9.
 
Twitter
Bob Golen
@BobGolen
Dog obedience schools have grades K - 9
10:14 PM · Apr 29, 2022·Twitter Web App