Think of what you are going to say. Don't make an exact speech because then if you don't go word for word, you may get nervous. Put some cues on the topic on a notecard. Practice in front of friends and family beforehand. Look above everyone's heads, so it appears like you are looking at them, but the eye contact doesn't disturb you. Lastly, don't be intimidated by them; I am sure they are all nervous about speaking in front of others. Good luck!