The links below only scratch the surface of the information in the world today. Google would have us believe they have indexed the world. They have not. For more information, go to Google or Bing and search "invisible web" and explore the possibilities.
Google Scholar Search Tips:
Google Scholar is an excellent resource for high schoolers with a serious bent for research. This is collegiate level.
As
you do your research, keep in mind the following types of sources that
you will need to consult. You will hear these terms used in
univiersities quite frequently.
a. Primary
resources. These include materials written by the person you are
researching or "provide first-hand accounts and is sometimes unpublished".¹ They could possibly include newspapers or other documents
written in the timeframe you are searching.
1) Humanities: letters, manuscripts, musical scores, images,
etc.
2) Sciences: data.
b. Secondary sources. These interpret for the work of other people or events. They tend to synthesize or interpret primary materials.²
1) Books, textbooks
2) Journals.
c. Tertiary sources. This includes materials found in the
reference area in the library. This is helpful to get an overview of your topic.
As you locate your resources, learn to develop a system for keeping track of your sources, quotes, and ideas. Put them in the citation style as directed by your professor.
¹ from UCLA Institute on Primary Sources, http://ipr.ues.gseis.ucla.edu/info/definition.html.
² ditto.