This voice levels poster is used in most preschools during my placesment, I think it is an effective way for teachers to control the voices in the kinder. Child also remember the colors and related voice levels that they should use inside and outside.
like the punch card not the treasure box. perhaps once it's punched out they earn "constructive free time choice" Behavior punch card, for every good thing they do you punch a number out. When all twenty are punched out they go to the treasure box.