Science fair report example shows the steps needed to create a science fair presentation. As the presentation preparation illustrates, prepare a speech/presentation from 3-5 minutes in length. The presentation that you will complete for your classmates will be very similar to the presentation for the judges. It should be noted here that the first step in preparing a presentation is to learn more about the audience to whom you will be speaking. As the science fair report example illustrates, you should rehearse your project, memorize your opening lines, practice your speech, practice presentation flow, understand that you might need a backup, and be extremely vocal about your research and find. As the report example below suggests, you can also use physical props to make your presentation more attractive.