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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.

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

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...

The HowStuffWorks Adventure Channel focuses on outdoor recreation, survival tips, exotic destinations and other places to visit.

Home page of The National Map

YouTube is a place to discover, watch, upload and share videos.

MathWorks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education

Welcome to Museum of the Earth! Explore Earth through a unique mix of natural history displays, interactive science features, and art exhibitions. Located in Ithaca, New York.

Geokov is a web application for outdoors recreation trip planning, information exchange, as well as environmental and natural resource field work and research.

The goal of this free online learning center is to help high school students prepare for comprehensive exams in English, math, global history, U.S. history, earth science, biology, chemistry, and physics.