WolframAlpha : The 21st Century Search Engine for educators

WolframAlpha is  a computational knowledge engine . While other search engines index web pages to look for textual matches accompanied by lists of links , WolframAlpha ‘uses built-in knowledge curated by human experts to compute on the fly a specific answer to every query .

Some features of Wolfram|Alpha

here are the basic features that underlie WolframAlpha service “

• It is free
• It does not need any login or sign up
• It interprets your input in a smart way and generate appropriate results
• It provides formulas and calculators
• It has buttons and pull-down menues to help you change what is displayed
• It provides pods with links to more information
• It has dog ears for extra information
• It also provides sources , references , and background information for extra links