Update: August 22nd 2015. I see that there is a book of the same title available from Amazon.
Book - Don't squeal unless it's a big deal
Amazon: In this highly entertaining story for young children, kids will learn when ""squealing"" on your fellow classmate is appropriate and when it is merely tattling! Set in a school classroom, the ""kids"" in the class constantly tattle on each other, creating an air of frustration and distrust. As the story unfolds, the teacher, rather than strictly policing the situation, addresses underlying feelings and encourages mutual problem solving. This story helps teach children when to ""squeal"" on important issues and when to work it out alone.