Topical Search

Searching for information by subject is very powerful. It can narrow the search for a specific item, or show broader relationships. There are many bibliographic schemes for arranging subject terms, from hierarchical thesauri to semantic networks. Other disciplines have diverse ways to organize their information space, and many researchers are looking for unifying principles.

CERES Environmental Information by Theme | - the Thesaurus Browser supports hierarchical browse and search within the thesaurus
Marco Polo (Internet content for the classroom) | - a partnership between MCI WorldCom and seven educational organizations, providing five discipline-specific educational sites oriented toward K-12 teachers
Gateway to Educational Materials | - helps teachers find topics among thousands of valuable educational resources on Internet sites

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