Social Bookmarking as a tool

Social bookmarking could really be used in multiple ways in the classroom. It could be used to assist children who are out for illnesses. The teacher could post Reading assignments for the students so they would be able to stay current with the class. The students could place assignments on their blogs and post blog addresses in the social bookmarking site. Another way that it could be used is for extra credit work. The teacher could post extra assignments for students to do on their own time and receive extra credit points. It could also be used as a tool to provide reinforcement for a lesson for those who do not understand their assignments. The Readings could go into further detail than the teacher has time to cover in the classroom.
In my setting (Alsace) it may not be as effective because the students are not allowed to go on the internet in school and for that we do not do any instruction on the internet.
I picked Diigo to use and it was fairly easy to figure out. My only problem was when I made my excel sheet I took off some of the web addresses to shorten them not realizing that it would create a problem. When I placed them on my Diigo they would not open. I also used a couple of the same sights and it would not put them in twice as different sites. I do believe that I would get better and more comfortable using this and could go through the steps with ease once I have practiced more. It will be something that I can find use for and have shared it with many of my colleagues.
My Diigo address is http://www.diigo.com/user/chauncymb03