Geek my class — Bouncyballs.org is a noise meter for your class....
On the Rebound: The Height Limits and Linearity of Bouncy Balls | Science Project
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Creative / Chaos: Bouncy Balls - Noise Meter for the Classroom
Classroom Noise Monitor Apps That Teachers Will Love
Practical Report: Bounce Efficiency
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Creative / Chaos: Bouncy Balls - Noise Meter for the Classroom
Bouncy Balls: A Good Tool for Managing Classroom Noise | Educational Technology and Mobile Learning
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Bouncing Balls: A Lesson Plan that Integrates Technology and Physics
Bouncing Balls Noise Meter
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Monitor Classroom Noise with Bouncyballs.org - Classroom Freebies