The following materials may be useful:

Personal/Professional Learning Networks
Helpful notes about personal/professional learning networks and possible roles of social media.
Project-, problem-, and inquiry-based learning
A chapter prepared for a book intended for a different audience but relevant here as background reading.
Some material prepared as background to a curation project in a previous offer.
Join the Mahara group
Instructions for requesting membership of the course group in Mahara (eportfolio)
Resources developed in the assignment
Design and Technologies & Digital Technologies