Have you seen this book by Julia Cook? I just got done reading/previewing it with my 2 favorite boys in the world. It is just a simple story that paints a very clear picture of when it is okay to "tattle" or report and when it is tattling. I will definitely be using this book and the language from it with my kinders starting as soon as that terrible tattling begins (usually around February or March during a typical year). I made a poster to share with all of you if you decide to become a Tattle Tongue Free Classroom!