What's a good educational blog post?

In my collaboration with the teachers on Youth Voices, we've found that students' posts were often more compelling when they "introduced, inserted, and interpreted" quotations from other sources, especially blogs and news sources that their students found by searching Google Blog Search and Google News.

Here are some examples from last semester of Youth Voices bloggers using published voices from blogs and news items in their own blog posts. As you read them think about the qualities that make a good educational blog post:

• Paul students at East Side Community High School, NYC: Jennifer, Felix, John (podcast listener)
• Susan's students at Eleanor Roosevelt High School, NYC: Robyn, Mercedes, Christina
• Chris's students at Judge Memorial High School, Salt Lake City, Utah: Ameera, Eric's China post, Emerson's myspace