At first, I had a difficult time figuring out how to convert the e-text on Natural Reader. However, once I figured out how to convert the file, it was a simple process. The first time you look for is a button at the top that looks like a disk. It will say convert to mp3. You click the button and save the file to the mp3 format. You can then open your file in an mp3 and have it as an audio file. I think any student or teacher could follow a few simple steps to complete this process. I believe this is a helpful feature because it means that students can have access to a file in mp3 format on their own computer at home, which could help them in doing homework assignments.
https://docs.google.com/file/d/0Bw-AwX9fUdwPZ2pha0pzQVl3Rmc/edit?usp=sharing