Many schools use the traffic light behavior chart system where the student is placed on "Green" (on a chart, the board, or has a green card, etc) to mean "Good Behavior". "Yellow" means "Warning". "Red" means you are in trouble/get a consequence. Some schools also have Orange and Black which may indicate going to see Principal, call home to Mom/dad, and other consequences.
I made this for a family to use at home. There are two sets of circles, one for each child. I put the child's name on a clothespin. The parents can move the child's clothespin to let the child know where they are. The clothespin can move up and down. It helps kids aware of where they are in their behavior, and keeps parents on track so they don't have to give a zillion "warnings" but can move right to "Red" if child is not listening and give a consequence.