The Big Rule: Tell them what you're going to tell them. Tell them. Tell them what you told them.
In other words, your presentation should have three parts: an introduction, body, and conclusion. Let's look at these three parts and see what you should include in each.
The purpose of the introduction is not only to introduce your topic, but also to interest your audience in the topic.
The body of your presentation should support your introduction by offering facts, opinions, and reasons to support your topic. It should contain at least three ideas with supporting details to illustrate your point.
The conclusion should restate the main points without giving examples. Think of it as a brief summary which emphasizes what you want the audience to remember. You can finish with a recommendation, a personal thought, an observation, or a question. Your closing statement (the last statement) should pull your presentation together.