Analysing article histories

Floriade (Canberra)
Wikipedia Page History Statistics are linked on every article's history page. This tool gives overall statistics (totals, averages), edits per year/month and edits per user, for a particular article. for Floriade
WikiBlame - find out in which revision some particular text was added. WikiBlame lists the revisions and whether or not they have the offending text. e.g. find "After some controversy" for Floriade.
Wiki Trust e.g. Jenny Macklin - Jenny Macklin history. diff where last paragraph was added (nb: Wiki Trust runs on an old copy of Wikipedia, now out of date)
WikiChanges - plot number of edits of an article over time on a chart. Can also plot two articles on a single chart for comparison. WikiChanges for Sydney vs Melbourne

Resources for educators on Wikipedia itself

Wikipedia:FAQ/Schools
Wikipedia:School and university projects
A good article from Wikipedia's internal newspaper, the Wikipedia Signpost: Wikipedia classroom assignments on the rise (Dec 2006).
Wikipedia:WikiProject Classroom coordination - a meeting place for Wikipedians who want to help teachers and educators with Wikipedia-related projects.

This used to be Wikipedia, anyway:

http://schools-wikipedia.org/ - 2007 Wikipedia Selection for Schools - 4,600+ hand-selected and quality checked articles with images. also available for download.

Potentially useful pages for investigating the "Global Village":