I always recommend using shorter lectures for online classes, and that seems to be the trend. The Chronicle of Higher Education says that many online instructors who record their lectures have found that 20 minute segments work well. It's a different situation in the face to face classroom, but even so, I know that I am not usually spellbound by long presentations unless the speaker is well-organized and has prepared their presentation well. With podcasts, the ones I listen to most frequently are around 30 minutes long, or if they are longer, I listen to them in two sessions.
I've been searching for podcasts about Blackboard and have come across a few. Some are too site-specific while others could use a little more polish before I would recommend them to others. However, one podcast I did find to be useful and high quality is Teaching with Blackboard by Jason Rhode at Northern Illinois University. Episode 5, posted last week, discusses how to incorporate RSS feeds into Blackboard using Feed2JS , a website and tool for converting an RSS feed to JavaScript which can be copied and pasted into your Blackboard course. This gives you a relatively easy way to add dynamic content to a course. For many instructors, RSS may be a foreign language, but I think if you listen to the five minute podcast, you will learn enough to get the idea. If you want more, Jason's previous podcast covers RSS and podcasting in more detail.
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