Eric Scharff's PhD-thesis contains a study on using Swiki for creating
course-material. [Chapter 8, I think]
"Open Source Software: A Conceptual Framework for Collaborative Artifact
and Knowledge Construction"
http://www.esig.ucar.edu/scharff/thesis.html
Wouter Vanden Hove
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http://www.opencursus.org
http://www.open-education.org