There's one or two good ones at least :)
One of them, my personal favourite, the computer science teacher just can't attend classes anymore for certain reasons. She's the only one who has a valid excuse for missing classes

Library is a subject too
I don't understand how
But that lady would hunt us down if we miss one of hers notes that she posts online at the most random times
One time, she posted a note at 10 pm, and when everyone was confused on what she was talking about, she snapped

She even called us illiterate, and the worst-performing class she's ever had because half of us failed last term's test. Not me though :) I would never

The subject and the teacher sucks
She'll be absent 8/10 times and leave us with a hundred assignments and plays to do in a week, and then magically materialize into existence again just to yell at us for missing assignments, then put us out of her class so we don't actually learn anything