Many professors use Google Scholar. It indexes many more items than publisher databases (such as ScienceDirect, SpringerLink, or Wiley Online Library) and includes many of the articles in the databases that the library provides access to. In fact, if you use the link to Google Scholar on the library's website, Google will even link you directly to articles that we provide access to. Without this link, you will be taken to a publisher's website and be asked to pay for the article.
In the tutorial below, we'll see how you should access Google Scholar.