The Online Books Page Listing and links to over 20,000 free books on the Web.
PBS. More than 4500 free lesson plans and activities from the PBS Teachers Resource.
Your Dictionary. Every specialty dictionary, glossary, and word list you could want. Topic and industry specific terms, rhyming, word games. An inspiration for those who love words. One of my personal favorites is the dictionary of the 100 Most Often Misspelled Words along with hints to remember the correct spelling of each.
EdHelper offers teacher resources for K-7. Although some of the site requires a subscription, many resources are free. Lots of lessons, worksheets and theme ideas.
Blue Web’n is a searchable library of about 1200 outstanding Internet learning sites. Find lessons, activities, projects, resources, references, and classroom tools.