As each new version comes along, you discover new features, and you latch onto them. Microsoft made available the latest Office product guides for Office 2010. To be honest, they aren't going to read the 500+ pages. Which means that only some of your teachers know that Track Changes in Word is brilliant commenting on and marking essays. Or that OneNote is a really useful for pulling lesson plans together, as well as for students to do research.
So the "Teachers guide to Office" might be just the thing to print out and leave laying around the staff room. It works for Office 2007 and Office 2010, and there're only 4 pages to it. It would be perfect as a teaser for a training afternoon, if you're planning anything for the end of term?
Office product guides for Office 2010:
Also, available are lovely classroom Office posters