This online article discusses the definition of communities of practice, how they might be used, where the concept began, how communities of practice are applied, and common myths.
Siemens considers connectivism as an alternative learning theory to behaviorism, cognitivism, and constructivism. Siemans writes about the principles and implications of connectivism.
A blog post that defines PLNs, what a PLN is and what a PLN is not.