Longer essays may also contain an introductory page that defines words and phrases of the essay's topic. Most academic institutions require that all substantial facts, quotations, and other porting material in an essay be referenced in a bibliography or works cited page at the end of the text. This scholarly convention helps others (whether teachers or fellow scholars) to understand the basis of facts and quotations the author uses to support the essay's argument and helps readers evaluate to what extent the argument is supported by evidence, and to evaluate the quality of that evidence. The academic essay tests the student's ability to present their thoughts in an organized way and is designed to test their intellectual capabilities.
For example, suppose you are writing about the last five . presidents for a psychology class. If you wish to show that these presidents' public decisions spring directly from negative issues in their personal relationships, you might order your information from most private to more public actions to clearly establish this connection. Or, if you wish to give the reader the impression that he is moving into increasingly intimate knowledge of personal presidential foibles, you may choose the reverse, ordering your information from public to private.