Kids in school certainly have learned the way of the classroom ever since the days of yore. And why not? They must endure the torture of lessons day in and day out. Nothing like a good screeching prank to liven things up a bit.
“OK, when the substitute walks in, everybody drag your nails down the board!”
Image courtesy of http://history.icanhascheezburger.com/2011/08/30/funny-pictures-history-hellions/.
Quipster 
Oh ACK!
As you know, I taught High School in my former life. I had one class that was great fun. I would say to them when they asked why I wanted something done “Because I have the big desk and you have the little desks”. So one day I walked into the room and my desk was in the back of the room with a kid sitting there and one of the student desks was in the front of the room. Hilarious.
Hahahahahahaha! They probably still talk about that episode in high school now with glee. 🙂
Oh I’m sure they do. I sure do. lolol.