Google Advanced Search - Information on educational and governmental websites tend to have more reliable information. In the advance search, along with your search terms, enter .edu or .gov in the box labeled "Search within a site or domain:".
The quality of the information you find on the Web varies tremendously so it is always a good idea to check the information against another source. As with all information resources, whether in print or on the Internet, you evaluate its quality based on the following criteria:
That's just the basics. Learn more!
Criteria to Evaluate the Credibility of WWW Resources
Evaluating Information - Applying the CRAAP Test (CSU Chico Library)