A plane breaks the sound barrier

An explanation about how the sound barrier and sonic boom is made

This video has demonstrations on the properties of sound waves

Hydraulophones are musical instruments that use water to produce acoustic sound, in which the fingers of the musician are in physical contact with the water.

A useful guide for parents and teachers to assist children in sounding-out phonemes at home.

Made by a class of 3rd grade ELL students using Microsoft PhotoStory 3. They drew a picture of what the meaning of the idiom sounds like. Then they drew a picture showing the real meaning of the idiom.