As an educational technology professor, I have noticed that teachers are really not very excited about blogging. Many have never even heard about it, and most do not know the benefits that blogging offers students.
Let me suggest some blogs that will get you and your students started in the blogosphere. Feel free to add more as it relates to teachers, students, and the process of blogging in the curriculum, and in the educational setting.
To start, explore Dr. Annette Lamb's Educational Blogging Sites. This site has a wonderful navigational map and all kinds of blogging starters: purposes, special activities, approaches, assessments, and much more.