Will Richardson is a former teacher who manages the blog site, Webblog-ed (http://www.weblogg-ed.com/).
In a podcast recorded by the School Library Journal, Mr. Richardson provides advice to teachers on how to use and create blogs for educational purposes: http://www.ala.org/ala/aasl/aaslpubsandjournals/kqweb/kqarchives/volume35/351main.htm

He addresses in general terms how teachers have used blogs in the classroom, issues of privacy, and how he got involved in the use of blogs when few people even knew what they were. The information that Mr. Richardson addresses is an excellent primer for entering in the world of educational blogs.

Richardson, W. (2006). Blogs, Wikis, Podcasts

Richardson’s book also talks about how teachers can use web authoring to help students strengthen critical thinking, writing, reflection, and interactive learning.