There's an educators' Learning Page and a great Today in History feature in addition to the massive research possibilities. Liszt, the mailing list directory Search 71,618 mailing lists for the information you need, or browse them by topic. If you know etymology, you can figure out the meaning of almost any word. Learn roots, prefixes, and suffixes. The folks at LookSmart give you quick access to Web resources in many categories, either by search engine, or through their own system of browsing ever-narrower subcategories leading to annotated links.
Main graphic is a bit big, but the site is very useful and easy to navigate.
MediaFinder MediaFinder lists information on 90,000 magazines, newspapers, and other print media. Search by subject and get publication, address, and subscription information on the research sources you need. Fascinating stuff if you're interested in the English language and its origins. This handy online guide of hundreds of Internet terms is a great resource. This gopher site is the beginning of a major library online.