Tutorials for using Audacity can be found at http://www.how-to-podcast-tutorial.com/17-audacity-tutorial.htm
I have used this program to easily make audio recordings of myself reading the weekly recaps for my City Colleges of Chicago online course, Social Science 101WW. These Wav files, which are available to students through our course web site, can be downloaded and listened to on an MP3 player.
One student responded with the following e-mail:
“Mr Fischer. Great idea placing the weekly recaps on audio. Thanks for taking the time to record all them for us. I dropped them onto my ipod and I listen to them while driving to work. It should help me with test #3 next week. Thanks again.”