This will help them follow along during your speech and give them something to take home with them to remember the information. If you are presenting your information to your class, you might want to get them participating along with you. This will take the pressure off you, not having to talk the whole time. If you can give them fun, hands-on activities based on your project, they will understand it better and learn more about it. You might also encourage them to give their personal perspectives on the topic by asking questions and for feedback.
People often remember things better if it relates to their personal experiences.
If you have made notes or written index cards with key points on them prior to the presentation, don't forget to use them. They will jog your memory if you happen to go blank or forget something important. If all this fails, do as 'they say' , and that is to imagine the audience in their underwear. I guess this has some psychological benefit, by showing you that you are not the only vulnerable one during your presentation. If you have just finished presenting your project to the class and have sat back down in your chair, wiping away the beads of perspiration dotting your brow, it is still not over for you.