When talking about sound waves, vibration, frequency, and pitch, I showed the students a video of different pitches. We cannot hear a frequency above 20,000 hertz. The video plays a freqency up to 18,000 Hz. http://www.youtube.com/watch?feature=endscreen&v=fFmiLHaKXhI&NR=1
I created a video which shows two different types of electric circuits and how they are different. The students made these circuits in class: a series circuit and a parallel circuit. This is a great way to review and clearify what happens for those students who didn't get their circuits to work. Also, this is a great recap for the students who were absent the day we did this in class.
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