Take a stretch, but don't wave goodbye. An interesting resource provides everything needed to present an introductory lesson plan on waves. Teachers present a PowerPoint defining the types of waves and their characteristics. Pupils use a...

[Free Registration/Login Required] Move the points to change the frequency and amplitude of the waves while making the waves transverse or longitudinal according to the labels.

[Free Registration/Login may be required to access all resource tools.] Covers three types of mechanical waves - transverse, longitudinal, and surface - and their characteristics. Includes labeled illustrations and two video animations.