To differentiate, I create sound files of instructions and then attach the resulting mp3 files to buttons on Notebook pages. Students can also create podcasts that can be initiated in a Notebook file. For the students who have Windows’ machines, we download Audacity and Lame to make the mp3 files. The Mac users have Garage band for their sound file creations. I found that my students learned to do this with very little instruction. They ROCK!