This example of Voice Level indicator was posted on Pinterest by Pam Gannon via Mary Buntenbach-Hastings- I love the 'Spy voice' hopefully it was inspire some !
This idea was posted on Pininterest in Happy Teacher via Always Learning.
This is a great free resource from ICT Magic. Set up on your Whiteboard - if the class is quiet the balls don't bounce !
This behaviour plan is simple and I am sure effective. The www.k-3teacherresources.com is a site worth exploring for ideas and activities.