Directory of resources :

Britannica.com - The Encyclopedia Britannica on-line...Absolutely terrific!

dictionary.cambridge.org/ - The Web's Favourite Learner Dictionaries - free Online English Dictionaries from Cambridge University Press: International English, American English, Spanish-English, French-English, phrasal verbs, idioms, learners of English

http://www.nationalatlas.gov/ - This Atlas updates a large bound collection of paper maps that was published in 1970. Like its predecessor, this edition promotes greater national geographic awareness. It delivers easy to use, map-like views of America's natural and socio- cultural landscapes. Unlike the previous Atlas, this version is largely digital.

http://concise.britannica.com/ - Britannica Concise Encyclopedia.

http://www.britannica.com/ - Find more detailed maps, updated with new country profiles and links to in-depth articles, in Britannica's new world atlas.

THESAURUS

http://thesaurus.reference.com/ - Free online Roget's Thesaurus of the English Language.