To Celebrate National Library Week (Next Week) OUP Will Provide Free Access to the Oxford English Dictionary & Oxford Reference Database
http://www.infodocket.com/...
I've always wanted to try the OED but it was more than my school library budget would allow.
In addition:
ProQuest Offers Complimentary Access to Six Databases For National
Library Week
http://www.infodocket.com/...
Included on the list is ebrary's "Schools and Educators Complete"
Finally, the ProQuest NLW resources are already accessible online.