Collaborative tagging describes the process by which many users add metadata in the form of keywords to shared content. Recently, collaborative tagging has grown in popularity on the web, on sites that allow users to tag bookmarks, photographs and other content. In this paper we analyze the structure of collaborative tagging systems as well as their dynamical aspects. Specifically, we discovered regularities in user activity, tag frequencies, kinds of tags used, bursts of popularity in bookmarking and a remarkable stability in the relative proportions of tags within a given url. We also present a dynamical model of collaborative tagging that predicts these stable patterns and relates them to imitation and shared knowledge.

Crowdsourcing tool. Could be used for muddiest points activity in preparation for class discussion, among other things. All students would need a Google account, though.

"For many people - particularly anyone over the age of 30 - the idea of describing your blow-by-blow activities in such detail is absurd. Why would you subject your friends to your daily minutiae?" This article helps those of us over 30 who have the same opinion.

We have created a list of 100 tools we think will encourage interactivity and engagement, motivate and empower your students, and create differentiation in their learning process.

XMind, combined with online sharing service, provides a revolutionary way to enable both team brainstorming and personal mind mapping.

Nice site with several articles and links on technology in education