about 80% of the school.
"Hey, everyone else is failing, that must mean that it's okay for me to fail also!"
Seriously, get a grip. I can't even believe that you would say "Even if I fall asleep in her class, she's obligated to teach me." She DID teach you, numbskull, but if you were the least bit responsible, you would've been awake to hear the lesson.
The world doesn't revolve around you, and the sooner you learn that, the better. No one gives a stuff if you have "sleeping problems." The successful people will keep being successful while the failures will fall behind and never amount to anything. It's the hard truth.
Also, the "as usual" part just locks in the fact that you have no respect for her or her efforts to teach you, therefore you do not deserve to be taught.