Many of the same issues that were a source of conflict in the Scopes Trial are still under debate today in 2013. Your research will need to focus on the current status of the teaching of evolution and the belief in Creationism, or Intelligent Design. Information is also provided on the First Amenment (censorship). You need to consider the concept of Academic Freedom (for education) and the tension that exists between some religious beliefs and scientific fact.
Key words to begin with are "creationism" or "intelligent design". You should know a little bit about Charles Darwin and the Theory of Evolution (but not the current theory of Social Darwinism) and Fundamentalist religion. Add to the keywords as you develop your research.
Begin your research with one or two essential questions. For example: Why was Darwin's theory so revolutionary? Why did he wait so long before publishing it? How did his theory affect education? science? religion?
There have been many court cases challenging the teaching of evolution in public schools. See the print reference titles. One recent case in particular occurred in 2005 outside Harrisburg, Pa, in the Dover Area School District. Use the links below to search for more information.
Kitzmiller v. Dover - This webpage from the National Center for Science Education provides a synopsis of the case and the ruling, as well as additional links on the testimony and similar cases. A Google search using the court case as a search term will turn up more information.
Intelligent Design on Trial - PBS Nova site that focused on the Kitzmiller case and follow up links