In tenth grade we recorded our recess-break conversation on a tape. Right before the teacher came into class we turned the tape on and stuck it into the ceiling (we had the “rice cake” ceiling).
The teacher came in and demanded silence so we all shut our mouths but the noise continued… it was hilarious to watch the teacher trying to figure out why it was so noisy when we were all sitting quietly at our desks!
BTW-I’m all for funny classroom pranks but I am horrified at some of the posts I read here about pranks that involved physical harm to ppl! Li8ke the prank with the blood capsule- what would have happened if this teacher really would have had a heart attack?! Or getting a teacher to sit on a broken chair- do you realize how dangerous that is…?!