Mr Wintell is the smartest man I know. His job is to teach us as much as he can before our brains turn to mush. The school believes the more they can teach us and stimulate our brains, the slower the turning to mush process will be. It might even be halted. No one's saying it can be reversed, so maybe staying as smart as we currently are is all that we can hope for.
That's partly why I'm keeping this diary. I don't want to forget things and if I write them down, I can always read over them to keep them in my memory. Unless I forget how to read.
Kris is a zombie. He and the entire zombie population are trying to get on the best way they can. But every day brings its own trial and tribulations. After all, it's not easy being undead.