Check out Waterloo's helpful guide on how to plan with technology. I wonder if this fits with our home page? Or might fit with someone's project topic?
"constructivism that recognizes all kinds of intellectual products as human constructions: theories, algorithms, proofs, designs, plans, analogies, and on and on." (pg 4). This really jives with my thinking: I have concluded (over time and much learning, observation) that EVERYTHING is a construct. I firmly believe in nurture over nature as a determinant in so many aspects of human development.
I launched my knowledge of PBL via this website. They offered free, online courses on this topic. They have numerous pre-constructed plans available to facilitate learning how to run PBL in the classroom.