Unless otherwise instructed by your teacher, you'll probably want to use a variety sources to help you gain a complete understanding of your topic. Sources of information generally fall within three categories.These categories are Popular, Substantive, and Scholarly (or Peer Reviewed). To use them skillfully you need to be able to identify them and understand their differences.
As you begin to explore your topic and seek answers to your research questions, you need to be sure that you're using the best possible sources of information. You'll most likely find a variety of sources during your research including books, articles, Web documents, interviews, films, and more.
You can feel pretty confident that books you get from the library and articles you find in the library's databases are reliable and credible because you know those have gone through a traditional editorial process; someone or some group has checked all the facts and arguments the author made and then deemed them suitable for publishing. You still have to think about whether or not the book or article is current and suitable for your project but you can feel confident that it is a credible, reliable source.
For each and every source you use you want to make sure it passed the CRAAP test.
Perkins, Kendra. “The CRAAP Test: An Easy & Fun Way to Evaluate Research Sources.” RefME, 19 Apr. 2016, https://www.refme.com/blog/2016/04/19/the-craap-test-an-easy-fun-way-to-evaluate-research-sources/.
For more on the CRAAP Test see our guide Evaluate Your Sources Using the CRAAP Test.
Watch the brief video below to see how this works.