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OpenStax

Open Stax: Catherine Schmidt Jones: Message Drums

For Teachers Pre-K - 1st
How did various cultures communicate before the invention of the telephone, email or telegraph? Discover the use of message drums in this lesson plan.
Article
Stanford University

Percussion Fm Synthesis

For Students 9th - 10th
Interesting site on the technical side of FM synthesis, including how to make different sounds. For either the very curious or very advanced student.