An introduction that focuses and establishes the importance of the topic. You may want to review the background or history of the topic or identify assumptions and questions that exist. Your introduction should include a thesis statement; a concise summary of the main focus of your paper.
A summary of the current state of knowledge in the field. You may want to talk about major discoveries that have progressed the field or controversial research findings.
A conclusion that summarizes the evidence presented and its significance. You may want to talk about the state of knowledge in the field (Are there questions left unanswered? Are there practical applications to this research? What are the implications and possibilities for future research?).