Are you sick of telling your students 100x what voice level they should be at and then telling them "if I have to tell you one more time, you will be on silent...".
As requested, I have listed my NOISE control and Sound Check chart.
Included is a sound check chart that includes: No voice, whisper voice (I use this for partner time), group voice, and teacher voice.
I also included the letters NOISE to display on your board. If students get too loud, simply remove a letter. When the letters NO are remaining they have to be silent. You decide if you want this to be for the remainder of the day or just that particular activity.