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Bouncy Balls review - App Ed Review
3 free classroom noise level monitors - Classcraft Blog - Resource hub for schools and districts
Bouncy Balls Review for Teachers | Common Sense Education
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Teach Starter - How neat is this...monitor classroom noise level with virtual bouncy balls! It uses the microphone on your laptop, you can 'see' the noise level and so can your students!!
Bouncy Balls Review for Teachers | Common Sense Education
Classroom Noise Monitor Apps That Teachers Will Love