Frequently your instructor will ask you to choose your own research topic. To help you get started, remember a research topic should be:
Manageable: Do some preliminary investigative work to see if there's too much (or too little) information on the topic you've selected.
Related to your personal interests: Choose a topic related to your personal interests. It's likely that you'll put more effort into researching a topic that piques your curiosity and more effort can mean a better grade!
Try these sources for ideas:
Reference sources are a great starting point for research and provide find background information on many subjects. Browse by subjects or search for a broad topic.