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Interactive
Georgia State University

Georgia State University: Hyper Physics: Speed of Sound

For Students 9th - 10th
Physics tutorial on measuring the speed of sound in dry air. An interactive form allows the student to practice solving problems involving the temperature dependence of the speed of sound.
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Website
The Franklin Institute

Franklin Institute: The Science of Sound

For Students 3rd - 8th
This Franklin Institute webpage provides an introduction to understanding sound waves based on 5th grade science lessons.
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eBook
Physics Classroom

The Physics Classroom: Waves: The Anatomy of a Wave

For Students 9th - 10th
Students explore the characteristics of both transverse and longitudinal waves.