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!
Evaluating Websites and Other Research Tutorials (LPC)
Evaluating Information - Applying the CRAAP Test (CSU Chico Library)
Google Scholar - a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines.
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:".
Many of the best sites to use are those from international (.int), education (.edu), government (.gov), and private organizations & foundations (.org). To easily search for sites from these entities, use the "site:" search to limit your results.