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National Geographic Education brings geography, social studies and science to life. Using real-world examples and National Geographic's rich media, educators, families, and students learn about the world and the people in it.

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia e...

Nature - the world

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

Enchanted Learning Software creates children

Dictionary.com - the largest and most trusted free online dictionary. Instantly look up accurate and extensive definitions and word meanings, and hear audio pronunciations.

Free online English dictionary from Oxford, plus thesaurus, word of the day, resume examples, letter writing, and English grammar

World Atlas is an educational resource for world maps, atlases, and in-depth geography information. Teachers and students: free maps of Europe, USA, Canada, Florida, Caribbean Islands and much more. Worldatlas.com

Vocabulary.com helps you learn new words, play games that improve your vocabulary, and explore language.

The largest and most trusted free online thesaurus. Quickly find accurate and up-to-date synonyms, antonyms, and related words at Thesaurus.com. Synonym dictionary, antonym dictionary, words synonyms.

wiseGEEK: clear answers for common questions

Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.