网站简介:World Wildlife Fund - The leading organization in wildlife conservation and endangered species
网站简介:Helps with memorization tasks through a variety of online flashcard activities. Students may use an existing study stack or create one of their own. Includes many topics including science, literature and languages.
网站简介:
网站简介:Contains photographs, video, and fun facts of this animal.
网站简介:Type in a word and search many dictionaries at once. Also has a reverse dictionary and translations.
网站简介:The home of one of South Korea's largest English newspapers, this site provides information on what is happening in Korea today.
网站简介:An index of terms, rules, interactive exercises, and handouts for students and teachers.
网站简介:Non-partisan information on U.S. federal and state candidates, ballot measures, issues and legislation. Includes directory of national and state political resources.
网站简介:A large archive of phrases, sayings, quotations and proverbs, with their meanings and origins.
网站简介:Features a different image or photograph of our universe each day, along with a brief explanation written by a professional astronomer.
网站简介:Presents information on a broad range of historical topics. Includes multimedia features, timelines, a section just for children, games, and articles by various writers.
网站简介:Includes games, songs, stories, various topics, and printable material.
网站简介:Offers news, background information, a database for military systems and equipment used, multimedia, photo gallery and links to other government and military departments.
网站简介:Provides an overview of the history of art as illustrated and represented in the collection of the Metropolitan Museum of Art.
网站简介:Math articles and formulas in calculus, linear algebra, analytic geometry and algebra with easy-to-understand examples and solutions.
网站简介:Explore the causes and effects of climatic and environmental change through the use of real satellite data.
网站简介:
网站简介:Provides wildlife fun, facts, games, creature closeups, and a chance to win prizes. The weekly series is made by BBC's Natural History Unit.
网站简介:A hands-on museum of science, art, and human perception in San Francisco. Site provides interactive online exhibits and exhibitions, activities, science news, and publications, general information about the museum.
网站简介:Interactive calculators for many common and exotic measurement systems, including metric, Ancient Greek, Roman, and old Russian.
网站简介:Provides games, activities, lessons, calculators for students studying algebra, geometry, calculus, or trigonometry including a daily problem.
网站简介:Offers lots of games on topics such as math, language, science, and social studies.
网站简介:
网站简介:Offers writing tips from professionals in the field, geared to High School journalists. Includes finding stories, conducting interviews, effective reporting and editing strategies.
网站简介:Interactive lessons and games with sound clips and videos for learning basic phrases in Spanish, French, English, German, and Italian.