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

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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...

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The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert co...

Offers effective teaching strategies, activities, lessons, lesson plans, worksheets, exercises, skills, tests, assessments for reading comprehension, language arts, literacy, fluency, phonics and phonemic awareness for children, especially those with...

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.