This site was recommended by the Youtube video http://www.youtube.com/watch?v=qnHfKo4asY8. Does not describe the special mask paper that is used to make masks.
This example of a pathfinder is a long list of links to websites followed by books with dewey codes. The page is not interesting or engaging.
This article suggests that wikispaces can embed media and handle RSS feeds. It could be a contender for pathfinder.
This site has premade examples of pathfinders on a range of topics
based on Joyce Valenza's research but is not an example of a pathfinder. First thing I read