Our users love the wikis, with one exception: printing. The idea of printing a wiki page-by-page can be a daunting task. If it were possible to download or view a wiki as a PDF or single HTML page that would permit them to easily create print-outs or redistribute a static copy of the wiki to students, parents, or anyone requiring a self-contained copy.
Our users feel the same way and would love the same functionality Robert has suggested. Really the same is true of the forum threads, but I guess these could posted to a wiki first and then printed.