Noise Level Monitor by Back of the Class with Mr B | TPT
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Miss Ramshaw on X: "Classroom noise level lights💡A simple and visual prompt for all learners 💬📢 #NQT #edutwitter https://t.co/rK94oiOBGJ" / X
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QUIET LIGHT™ Classroom Noise Monitoring Traffic Light | ASI
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Yacker Tracker Noise Level Monitor Detector - Visual LED Traffic Signal Light - Great for Schools, Classrooms, Cafeterias, Hospitals and More - 17" : Amazon.ca: Industrial & Scientific