Unsure if a website is credible? Give it the CRAP test!:
C - Currency
How recent is the information? Has the site been updated/ maintained? How much does the date of the resource matter for your topic?
R - Reliability
|What kind of information is included? Is it biased or balanced? Does the resource give a citation or source material?
A - Authority
|Can you determine the author, creator, or publisher? What are their credentials?
P - Purpose
|Is the source fact or opinion? What is the domain (.edu or .com etc.)? How much of the site is ads? Do they relate to the information being presented? Why does the resource exist?
Not all web resources are created equal! Only .gov and .edu domains are regulated - which means not just anyone can get one. How do you just get results from these sites? Try a Google Site Search!
Go to http://www.google.com. Type in your search term(s) followed by site:.edu like this:
You can also do this from Google's Advanced Search (http://www.google.com/advanced_search)