The article describes Web 2.0 as a revolutionary technology for actual learning. Using the example of the Wikipedia article about Fukushima, it discusses emergent processes of knowledge building and explains how they can be used for learning purposes. The examples make it obvious that it is the social system that makes groups work so effectively.…

Though open educational resources (OER) promise to transform the conditions for teaching and learning worldwide, there are many barriers to the full realization of this vision. Among other things, much of what is currently considered "free and open" is legally, technically, and/or culturally incompatible. Herein, the authors give a brief history…