I received some email about my last video, where I showed a mnemonic shortcut for metrix prefixes, that was a bit critical, so here is why you may want to use some memory aids.  The number one reason, as explained in the audio clip, is to allow students to have some success with the prefixes so they do not shut down and decide they hate your class.  Try some - it's not a perfect method, but it's all about capturing students and removing the fear that often comes with a science class. 

This was produced on my new computer, so it's light on the music and sound effects - I'm sorting all of my clips before bringing them over to the new system.  I'm working on recording most of my old lessons, and I should have some good material up shortly.