This voice thermometer provides a visual for students who have a little trouble with volume control! Teach students about maintaining a "cool voice" by keeping it in the green zone--just like where you would want to keep the temperature in your house--not too hot, not too cold, but right in the most comfortable range.

Make one large one for your classroom to use as a reference, or use the smaller ones to tape to individual student's desk as a reminder to "Keep it Cool!"