From Mary Graves, a math coach and department chair at Westridge Middle School in Orlando, Florida:

To quiet my class, I use a wireless doorbell. I carry the button with me when I work with small groups. The students know that when I ring the doorbell, they need to lower their noise level. If I ring the bell while standing at the front of the class, the students know that I need their silent attention. The wireless doorbell has worked well for me and is a very inexpensive item.

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