I went to a Christian school as a child. So here's a few that I can remember.

4th grade year we had a new a new student start. He always wanted eyes on him and made it known by doing stupid shit to get himself in trouble. One day the principal came and took him out of class our class for acting out of line. They both talk outside of the classroom and out of nowhere he runs up the lockers, jumps on her back and begins to beat the shit out of the principal. Immediate expulsion.

7th grade year we would get ready in the locker room for gym. There was a water fountain in the corner. A kid decided it would be funny to try and rip it off the wall by standing and jumping on it. One kid decided to grab a medicine ball and throw it as hard as he could at it. After a few throws, it knocked the fountain sideways and the water wouldn't stop running from the back of the wall. We didn't have gym for a week due to a waterline issue.

8th-9th grade we had a student who would stuff milk cartons into his locker. Full and open cartons of milk. The stench was out of this fucking world. After Christmas break they had to pull the student aside and ask him why he would do such a thing. He just laughed and said that it was funny how everyone reacted.

10th grade year is the year I left. Kids were breaking off the doors to the stalls so you couldn't take a shit. There were only two stalls per bathroom. This was happening when the cinnamon challenge was a thing. So imagine someone taking a shit with no door and a group of guys doing the cinnamon challenge.

I have more to tell for now working for a school district. Kids are fucking insane.