I found an elementary school in China who uses blogs. The blog is between the students and the teacher. It is kept regularly on a day to day basis. The teacher post the objectives of the subject material the student should have left school that day with. There is a comment section that I believe the students were supposed to make small informative post in regaurding the learned objectives. The teacher also post homework on the class blog. Towards the bottom of that days entry the teacher will also put the ideas and materials being covred the following day. Http://www.blog.ceres.k12.ca.us/djones/category/China.aspx