21 st Century Learners Lesson 4 Grades 3-6 Bruce Luck

What You Will Learn About Search Engines Boolean method of searching the Internet

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 Internet using 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

Narrow your search by adding 3 words: and or not

Boolean Operations: and, or, not AND All 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 OR All students with tie shoes OR Velcro shoes stand up All students with tie shoes OR Velcro shoes stand up AND blue jeans stand up NOT All 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: 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 Google Type “cycles” (62 million) Type cycles AND water (22 million) Modify search by dragging “and,” “or,” “not” pieces cycles 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 Planner einert.creighton.edu/101/srchplan.htm Boolean machine interactive:

More on Boolean

What Did We Learn Today? Search engines What are some? Boolean Method What does it do? How does it do it? What are the 3 key words?

Teacher Resources GSD TechSmart lessson plan 6%29