Web 2.0 and Problem-Based Learning

I came across this article by Catherine Hack that explored the use of Web 2.0 technologies in problem-based learning (PBL).  It was mostly a series of examples from class activities at the University of Ulster that employed these techniques.  What I found most interesting was the table she provided, that suggests particular tools for achieving specific scaffolding objectives related to different steps in the PBL design process.  I have attached it here. 

From article:

Hack, C. (2013). Using Web 2.0 Technology to Enhance, Scaffold and Assess Problem-Based Learning. Journal of Problem Based Learning in Higher Education, 1(1).