I'm in 11th grade and this happened near the end of the year close to exams. So usual History lesson. I walk in, unpack my stuff, etc. Say hi to my teacher and she says hi back. I'm one of the best students in the class so she respects me. Then suddenly the other history teacher calls me and says he wants to talk. He isn't my teacher but he's the head of the department at my school. He proceeds to shout at me for no reason and said I'll get a B for my exams whereas my teacher predicted me an A*. I got a bit confused and ask him what's going on. He said my Controlled Assessment was bad and I don't try as hard in lessons. I get slightly pissed and say to him how does he know how I perform in lessons when he's not my teacher, but being the -blam!-ing asshole he is, he doesn't answer back and said I'll get a B. I then say to his ugly face "You're not my teacher, your opinion is irrelevant, so please. Stop wasting my time." I swear to God he erupted after that, then I walk away back into my classroom and a deputy head came out of the staff room to calm his salty ass. Next week, my teacher tells me I got 46/50 for my Controlled Assessment. I then go to the other teachers room and show him my grade and he quietly mutters "I'm sorry." Suck my dick bish.