Each paragraph should relate to and support your thesis or central argument. Use specific and concrete examples to support your general statements. Be sure your facts are correct and that they support your argument. If you have taken an English composition class, you should be familiar with the elements of good grammar and how to apply them in your essay. Do not just explain what happened but also try to explain why it happened and why it is significant.
Facts are important, but without interpretation, they become meaningless.
It is important that you are able to use the material to develop an argument which supports your point of view. You will be rewarded for independent and original thought. Make your essay interesting to read. Don't assume that your professor knows everything that there is to know on your topic. The conclusion can be as simple as a restatement of your introduction.