An essay usually takes the following structured format: The function of the introduction is simply to introduce the subject, to explain how you understand the question, and describe briefly how you intend to deal with it.
You could begin by defining essential terms, providing a brief historical or personal context if appropriate, and/or by explaining why you think the subject is significant or interesting.
To write a provisional introduction, ask yourself what the reader needs to know in order to follow your subsequent discussion.
Other students write the introduction after they have written the main body of the essay – do whatever feels right for you and the piece of work you are writing.
To guide the reader through your work you will need to inform them where you are starting from (in the introduction), where you are going (as the essay progresses), and where you have been (in the conclusion).
It is helpful to keep the reader informed as to the development of the argument.
A full reference should also be provided in the reference list at the end.
At the end of an essay you should include a short conclusion, the purpose of which is to sum up or draw a conclusion from your argument or comparison of viewpoints.
Keep the introduction short, preferably to one or two paragraphs and keep it, succinct, to the point.
Some students find it best to write a provisional introduction, when starting to write an essay, and then to rewrite this when they have finished the first draft of their essay.