Take that digital voice recorder around your school. Record out on the playground. Get the feelings of students on the new equipment; ask them how to solve common playground problems, etc. Go interview a new student or new teacher. Interview the janitor to see how she or he would like the students to take pride in their school. Go to a special PTO event and record reactions of students. You can import it directly or you can use audacity to edit it. Then use mixomatic to include introductory and/or ending music and your podcast is finished. Have fun podcasting.
Why not podcast about your special events and keep people informed about the happenings around you.
You can podcast easily on this site. You sign up and sign in. Then you type in your information on your podcast page. Record your edisode, publish it and then let people know it's there.
Learn how to do it with the text tutorials on this site or use the podcast tutorials at http://tutorial.podomatic.com/