I have a few. Went to five schools altogether, and some shit happened, but mostly, my school was fairly boring.
1st grade (7 year old) we've had a kid who could not read or write, at all. Most kids at this time could string a few words together, or read slowly, but they'd get there. What he could do though was to name every single pokemon from his memory, including their skills, what they looked like and how they performed. And I mean every single one. At the time it was a huge thing in eastern europe, you'd have those collectible chips in bags of crisps, and kids were going crazy over them. It's not really that interesting, but it's somewhat funny to me now.
5th grade, we've had some sort of school show for mothers day. Some guys mom couldn't make it, or forgot about it, or something - she did show up afterwards, but right when we were finished. We were doing some song together, and he broke down in middle of his part, and just went off. I still feel bad for him.
In 6th grade a kid (notorious wannabe gangsta) went around the parking spaces and removed car emblems on every single car that stood there. Then he fucking brought it to the class, and showed everyone... including the teacher. Teacher brought it to the principal who noticed that his car had scratches on the back and missing emblem. Guess who took them.
This kid was pretty retarded anyway, as far as I know he is currently serving a sentence for busting up a bus.
I personally skipped over 400 hours in 8th grade. Barely made it on the worst notes possible. Teachers and principal did not give a fuck (usually, where I went if you had over 100 hours skipped you'd have to repeat a year). I think they just didn't want me to stick around any longer than it was necessary.
That entire school was fucked up. I went there from 7th to 9th grade. A few years before I arrived they've had very successful students, got a lot of prizes, and became THE school to send your kids to. Obviously, they never managed to repeat that, but fuck me they tried hard. It didn't help that it was a school that some kids would just have to go, because that's how the schools worked back then, so you'd end up with all sorts of skill levels. It ended up being the worst school in the city after a bit, with grades falling across the board purely because of the pressure that teachers tried to put on the students. When my class was done with our three year turn, principal refused to take a picture with us, and the kid that had to repeat his year broke off mirrors in his car. Obviously, no one saw anything.
In 10th grade we've had a school subject that could be translated as "defense preparation". You get to know warning signs, be it written, air sirens, warning shields, very basic military explanations, and info on what to do should shit hit the fan. This all included shooting. Every kid in the class had to take at least twenty shots with a .22 rifle, using actual live ammunition. What you're supposed to do, once you've fired your shots, lay the rifle, wait for an "everything clear" sign, get up and fetch your card. The new class tard (probably the class clown before) goes up immediately after firing his ten rounds, and goes up to the card... when four other guys are still shooting and they can't see him. Including one guy with pretty bad lazy eye. Somehow, the tard didn't get shot, but was banned from visiting the firing range ever again.
The same tard almost managed to get his head chopped off by the An-2 plane propeller. We've been doing a sort of internship at the airstrip nearby as a part of the school program, and the plane has just been fixed, so the engine was being warmed up. Tard in question went along the fuselage, around the wings, and strolls right towards the propeller. A mechanic yanked him back and probably saved him. He shouldn't have done that, really.
In 11th grade we've gotten a new class teacher. Our old one went to different school. New one was very chill and direct, for good and bad. You could ask him about everything, and talk about everything, but he'd also not hold back his criticism. One day he EXPLODED on a few guys in our class. He started with "Since you don't seem to understand when something is said the normal way, I'll talk like you guys usually do." A lot of kurwas were thrown in full temper that day, but it worked. Parents of one of the tough guys complained to him, and he pretty much told them that if they don't like it, different schools will accept their kid. I really liked the guy, still talk to him from time to time.