This one is from a collection I have that was put together by David Sedaris called "Children Playing Before a Statue of Hercules." I read a few stories from it a couple years ago and then never finished the rest, and as I was cataloging and purging a lot of my books recently I came across it again.
"Gryphon" is from the point of view of an elementary school boy and is about a substitute teacher his class has for a couple days. She is an odd duck and tells the children more and more bizarre things, starting with "sometimes six times eleven is sixty-eight" and ending with telling their fortunes in class with tarot cards. When a boy whose fortune included the death card reports the substitute teacher and she is removed from class, the narrator gets upset and starts a fistfight with the tattletale.
I'm completely neutral on this story. I enjoyed it while I was reading it, but I was left feeling nothing in particular about it at the end. Just "eh."