If you want student engagement then the SMART Board Presentation is the way to go. My students are much more interested and love to participate when I use the SMART Board. Make sure you download a copy of the FREE cornell notes for this presentation. This SMART Board presentation covers the basics of EM waves: wavelength, crest, trough, amplitude and frequency. It also goes into the EM spectrum and has several different interactive assessments, such as labeling an EM wave, matching the word with the correct definition, and placing the EM waves in the correct order based on decreasing wavelength. This presentation addresses California State 7th Grade Science Standard 6B - Students know visible light is a small band within a very broad electromagnetic spectrum.