My high-school math teacher made us all submit our work in these tiny notebooks that were like less than half the size of an American standard notebook, with unlined paper. He would write the homework problems on the board and then you had to copy them into the tiny-ass notebook and then hand write all your work on the single tiny-ass page, he would fail you if you used more than one page or side of a page because "One page is all the room you need to work out a problem."
I am really horribly bad at math and even writing numbers down is hard for me, sometimes i can't even read what I wrote, so being forced to write them even smaller was a nightmare. I barely passed his class. Plus he was just a total dick in general to anyone who struggled in his class, and most students did (it was already the math class for dumb people), and we could all tell he didn't want to be there.