I have recently attended a few Wikipedia editing sessions and become interested in contributing more to Wikipedia. There is much editing to be done on pages relating to libraries and librarians; some of those pages are quite inadequate, and many have been marked as such using the Wikipedia coded messages that point out problems. The page for the LCCN is a stub, for example. Search on Sears Subject headings and what you get is a pretty poor page for Minnie Earl Sears with some information about the subject headings. Lately I've been updating the page on the Dewey Decimal Classification, which had little background information and did not have appropriate citations. I hope to move from there to the rather strange page that "compares" DDC and the LC Classification.
I estimate that I spent between 20 and 40 hours doing the research for my updates to the DDC page. The reason for that is that the Wikipedia standard requires that all facts be sourced. Add to that the requirement for a neutral point of view (called NPOV in wiki-speak), and a good Wikipedia page is a set of sourced facts, with some clear writing connecting them. (And, yes, there are a lot of not-good Wikipedia pages.)
It occurred to me that if I were a teacher I could use Wikipedia as a learning experience. Wanting your favorite topic to be well-represented in Wikipedia is a great motivator. Having to source all of your facts (and being pretty much limited to facts) means having to do research. Doing research becomes a good activity for discussing how to find sources and how to evaluate them.
Then I thought: wouldn't it be great to run a Wikipedia editing session in a library? What better place to have access to the sources? An editing session in a library with reference librarians on hand sounds like a Wikipedian's dream, and it could be used to teach people how to use the library.
Have you done this? I'd like to know.