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Search Engines
What are search engines?A computer program designed to search things on the Internet
Which search engines have you used before?
Which is your favorite?
Any problems with them?
Too Many Sites to Choose From
or Not Enough Info on Some Sites
“Businesses” = 586 million sites“Business” = 3.8 billion
“Big 6 research steps” = 7.8 million
“Lady Gaga” = 319,000,000
“Lady Gaga + Adam Lambert” = 1.6 million
Searching the Internetusing the Boolean Method
Because of too many choices for Internet searches
We need a more efficient way you search the internet - to help narrow your search
The Boolean Method
Boolean Operations: and, or, not
ANDAll students with tie shoes stand up
All students with tie shoes AND who are boys stand up
All students with tie shoes AND who are boys stand up AND with a name that starts with S
ORAll students with tie shoes OR Velcro shoes stand up
All students with tie shoes OR Velcro shoes stand up AND blue jeans stand up
NOTAll students wearing blue jeans but NOT tie shoes stand up
All students who are boys and NOT wearing blue jeans stand up
Boolify
Another search engine:http://www.boolify.org/ to show Boolean operations
Boolify
Let’s try: cycle
Drag green “word” puzzle piece into center of screen & type in “cycles” (6.7 million)
Drag blue “and” puzzle piece & type water (3.8 million)
Modify search by dragging “and,” “or,” “not” pieces
cycles AND water NOT climate
cycles AND water OR rainfall
“water cycle and rainfall” (2,000)
Google-ify
Let’s try: cycle with Googlehttp://www.google.com/
Type “cycles” (62 million)
Type cycles AND water (22 million)
Modify search by dragging “and,” “or,” “not” piecescycles AND water NOT climate (7 million)
cycles AND water OR rainfall (1.5 million)
“water cycle and rainfall” (11 million)
“water cycle” (11 million)
Student Choice:
Need an acceptable keyword to try
Then narrow the search with “and,” “or,” or “not”
Database Search Strategy Plannerhttp://web.archive.org/web/20031205092931/http://reinert.creighton.edu/101/srchplan.htm
Boolean machine interactive:http://kathyschrock.net/rbs3k/boolean/
More on Boolean
http://www.eduplace.com/kids/usingweb/index.html
http://www.internettutorials.net/boolean.asp
What Did We Learn Today?
Search enginesWhat are some?
Boolean MethodWhat does it do?
How does it do it?
What are the 3 key words?
Teacher Resources
GSD TechSmart lessson planhttp://gsdtechsmart.wikispaces.com/Lesson+1+%283-6%29