The databases listed above may be very helpful for definitions of concepts related to your topic and background information. Below are some more sources.
Dictionaries and encyclopedias
Information about countries
What do you want to know about your topic? Turn it into a question. Asking a specific question will help you to:
Topic: children and video games
Question: Do violent video games have negative effects on children?
Topic: gay adoption
Question: Should same-sex couples be given the same legal rights as heterosexuals in adopting children?
Where do I find help turning my topic into a question?
The databases in the box above, for example, Opposing Viewpoints in Context and CQ Researcher, may provide examples of questions or statements in the articles - you may need to look inside the article, not just at the title.
A helpful public database for finding questions: Debatabase
Once you have formulated your research question, you need to identify key concepts and their related keywords.
From Question to Keyword (video produced by University Libraries, University of North Carolina Greensboro)