Here are some great sites with resources for teachers....
Education-related information or offerings that we have to help teachers, including:
1. Resources on www.microsoft.com/education.
2. Resources from other Microsoft groups especially Office Online
Let me know if the links don't work!
For years while still an active educator I maintained a teacher resources site, that after my retirement has moved to http://moourl.com/EdLinks. A lot of the links still apply to the El Paso ISD, but it will slowly turn into a west Texas resource. On the topic of free resources, I am also working on providing a Kubuntu-based cluster (1 main unit & 5 thin clients for around $2k). You can find Open Source resources at http://hodsondts.org. While there look for the iK-16cluster at the end of the page.
I'm a fan of Richard Byrne's blog - free technology for teacher. Check it out: Free Technology 4 Teachers. Lots of free, edtech tools reviewed