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Wolfram/Alpha is to be the first web-based tool that can find answers to all systematic knowledge in the world. For educators, this "computational iknowledge engine" can find objective and fact-based answers for a variety of subject areas. Type in "Newton's Law," for example, and the formula for force is explained. Enter in an equation for a line, and the site plots the line on a graph. Ask "What is the GDP of the United States and Canada?" and a chart depicts a side-byside comparison of the nations' economic data.

Search Credible is a search service that allows you to access 26 different search engines from one location. Included in the list of search engines Search Credible searches are Wolfram Alpha, EBSCO, ERIC, and the usual suspects such as Google, Bing, and Yahoo. To use Search Credible just enter your search term(s) then click on the search engine of your choice. Thanks to Richard Byrne.