You'll find lots of great content on the Web. However, it's important to choose these resources with care, evaluating for reliability.
Consider searching some of the databases listed in this guide to find other publications by this author – is this author publishing in scholarly journals, as well?
Listed here some of the best general-purpose science search engines. Scroll down to find more links that might be particularly useful for this class.
In Google, try using the Advanced Searching option for more control of your retrieval:
Notice that once you start typing in your search terms, a "gear" image appears on the far right, under "Sign In".
Click here to enter the "Advanced Search" page.
Try out Google Scholar – scholar.google.com -- where your retrieval will be limited primarily to journal articles and educational web sites.