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For Teachers

What is Boolean Search?


Boolean searching is built on a method of symbolic logic developed by George Boole, a 19th century English mathematician.

Boolean searches allow you to combine words and phrases using the words AND, OR, NOT (known as Boolean operators) to limit, broaden, or define your search. A good researcher should know how to do a Boolean Search.


"AND" logic


AND : Using AND narrows a search by combining terms.




"OR" logic


OR : Using OR broadens a search to include results that contain either of the words you're looking for.




"NOT" logic


NOT : Using NOT will narrow a search by exclusion. (Some search engines, like Google, recognize the minus (-) symbol, instead of the word NOT).



Quotations : Placing quotations around a specific phrase will help you narrow results in order to find information containing that exact wording.

Boolean Searching on the Internet

Power Searching with Boolean


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i like this pattern

this site helps

this site helps

it is good

it is good

This is well explained. Thank

This is well explained. Thank you.

Explained well, but somewhat outdated...

This is no longer used by internet search engines, and I have never been so upset with "improvements" in technology...

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