Collab-o-Write is a social media tool that lets students create or contribute to a story that is written by a number of different users.
http://library.thinkquest.org/2626
This article suggests how to use Web 2.0 tools to assess students in the digital age. The article has many useful links. I wish that the examples of the actual rubrics were larger. Overall, I found the article to quite helpful.
How do we assess students' learning in these in Web 2.0 environments? We want to go beyond assessing the mere mechanics of using these tools; unfortunately, most current rubrics for Web 2.0 learning devote only a minuscule amount (usually 16% or less) to actual student academic learning.
This article is about standards-based learning and 21st century skills. How to improve student learning through teacher's decisions and technology. He has a excellent list of rubrics Web 2.0 tools. Some examples "rubrics" are......Wiki/Blog, Images/Photo/Flickr, Video/YouTube,Podcast, Social Bookmarking, Twitter, Videoconferencing, General Assessment: Prensky's 21st century skills, General Assessment: enGauge's 21st century skills, General Assessment: Partnership for 21st century skills. I really liked the links and rubrics and found them very helpful. However the rubrics were small and a little hard to read.