Here's a podcast called Blogging for Beginners from this Thinking About Learning blog. This podcast is for students to introduce the concepts of blogging.
Here's a great quote from this blog:
My school is in the midst of a blogging revolution! It all began with one 5th grade teacher who was willing to try something new, (thanks, Emily!) and now it’s the latest craze. The students in all six 5th grade classes, four 4th grade classes, and even one 3rd grade class have their own blogs. That’s over 220 blogs in our school! The goal is to blog at least once a week. The students love it because it’s fun. They stop me in the hall in the mornings to ask if today is their day to blog. Teachers love it because it motivates their students to write, it ties directly into their curriculum, it builds literacy, it improves technology skills, and it provides a great way for students to reflect and share what they’ve learned.