Podcasting, webcasting, and coursecasting have become quite popular on college campuses, and hopefully the craze picks up at the K-12 end soon. These course enhancements can be something as simple as an audio file or as detailed as a video production. These are quite useful tools to help students study or review lectures or presentations from class. They also benefit those that are absent or those of us in distance courses that can't always attend synchronous learning engagements. iPods have shown efficiency in my classroom by recording student reading fluency. Instead of reading in the classroom, they record on an iPod in a quiet place and I listen and grade later. It's pretty helpful for struggling readers too shy to read in front of classmates. I have also put powerpoint presentations or audio files on them to help students with tests. They are allowed to choose from a variety of resources in the classroom to aid them (cheat sheets, textbook, iPods) and hopefully improve their test scores. I also put this into effect for practicality reasons. How often are we in a position where we can't look up how to do something? I provide this sense of reality to my students and hope they take me up on the offer.
I, however, struggle with listening to just a podcast. I need video. I need visual stimulation. I attribute it to an undiagnosed case of ADHD. So video podcasts are the way for me. I also prefer to make these since I am typically making podcasts for math class. I could verbally tell students how to solve problems, but most need to see math visually.