Grades: 6-12; Subject Areas: Science. (2001) Explores the nature of waves, illustrating different characteristics of waves, including amplitude, wavelength, and frequency. Describes various types of waves, including transverse and longitudinal waves, and explains how the speed of waves is calculated. Examines the interactions between waves, reflection, refraction, diffraction, and interference. Includes a ten-question video quiz. For the teacher's guide go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLfQnBhVHMwYXdiNlU&usp=sharing