discussion about (variables)

Project Description:

i want only one paragraph (less than one page) answering these discussion's questions:

in class we discussed variables and controlling them for the purposes of research. we also discussed various searching tools for information.
we said the search engines/tools that we most commonly use are:
wikipedia - weakest
google scholar
ub library databases - strongest
in this discussion, lets share where do you go to find information for our classes...
please share with the class: a) what search engine/tool you use? and b) why you choose to use it?
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