There are a million and one ways that you can implement podcasting in a classroom. I may not have a million examples…yet, but I do have some great ideas to share with you.
If you are looking to get started with a great activity that won’t take a lot of work to get off the ground, consider joining our “Where in the World?” 
podcast project. Texas educator, Anna Adam is coordinating this global geography quizcast for me.
Listeners can use geography and deduction skills to use the clues and discover the exact location. An email is given at the end of every posting, so you can email them with your guess. If you guess correctly, you’ll get a postcard back from the producers!
Download detailed instructions to participate in the Where in the World Quiz Show!
You can subscribe to WHERE IN THE WORLD right here!
Here is a link to the Wikipedia. It is an open source encyclopedia where you can post detailed information about your own community and/or school.
More Examples
Check out this Flash-based presentationhat outlines about 20 podcasting activities that span the range of grade levels and curricular areas. I KNOW it says 10 on the presentation’s first slide, but once I got rolling I could barely stop at 20! 
(note: This flash file is about 6MB, so it may take a few moments to download)