My teacher uses a Noise Meter similar to this one. The Noise Meter is a cool way to remind students the correct noise level that they should be using! You just use the paper clip and move it to the appropriate noise level the students should be using.
gestion de classe : carnet de comportement et affichage
I thought the idea of incremental punishment is good, gradually prolonging the loss of recess time gives teachers and students room to work and improve before giving them a harsh consequence for misbehaving based on the level of misbehavior.