A giraffe letter is one that goes all the way to the top of the line.
A chicken letter stays between the middle line and bottom line.
A monkey letter is one that starts at the middle line and swings down past the bottom line (like a tail).
I give each parent a copy of the guide at open house & explain how it works. I also have a big poster of the guide displayed in my classroom. Each Monday, I pick a new personal assistant to help run the class. (They get to run calendar, be the leader, sit in a special desk, pass out lunch cards & papers, help enforce good behavior, etc.)