I have started a new and very silly podcast for little lessons for elementary school. It is at http://feeds.feedburner.com/SubstituteTeacherPodcasts. Right now, all I have on it is a practice for the 7 times tables. I find that feedburner is a little slow (but extremely useful). Other sources have given instructions on how to embed the code in your web page. I might try that-- but for now I'll stick with this.