From the New York Times: In the Classroom, Web Logs Are the New Bulletin Boards (try BugMeNot if you want to avoid registering).
Like most NYT articles, this one may soon disappear into the “pay-for” archives. Save or print the text if you want to keep it.
Also, an excellent and detailed article on educational blogging (with a Canadian slant, to boot), from the Educause Review: http://www.educause.edu/pub/er/erm04/erm0450.asp.
