Negative behaviour>Presenting behaviours

Within a school, it's important for there to be agreement on the levelling of behaviour and which behaviours go where. For example, I have worked with schools where the staff think it's worse for a child to swear at another child than at a teacher.  Personally, I think it's the other way round but it's important to have this discussion early on.
As to the behaviours chosen, I would advocate 8 behaviours for each level, with some behaviours escalating through the levels.

This means coming up with 24 significant negative behaviours, some of which being duplicated in severity and then a sorting out into the three levels;

Low, Medium and High, Blue, Yellow and Pink

If a behaviour isn't appropriate for your school then simply don't include it or simply change it

Here's a list of 24 I use but change frequently when working with teachers

Harassment/teasing
Inappropriate behaviour
Walking away from an adult
Leaving class without permission
Swearing at adults
Vandalism
Unprovoked extreme aggression
Racist behaviour or comments
Cruelty
Bullying
Rudeness
Persistent disruption
Blatant defiance
Leaving the school premises

Poor punctuality
Task refusal
Not having equipment
Misusing school equipment
Inappropriate sexual behaviour
Aggression
Swearing at others
or out loud
Fighting or rough play
Blatant defiance
Leaving the school premises
Theft
Persistent bullying