Project your voice so that everyone in the classroom can hear you. This does not mean that you should keep your volume at one steady rate. Raise and lower your volume to draw the audience in. Change your volume when you are trying to make a point or when placing emphasis on an idea.
Align the tone of your voice with the seriousness of the topic. For example, if your topic is about the mortality rates of a disease, you should maintain a serious and straightforward tone. On the other hand, if your presentation is about various hairstyles, it is acceptable to infuse humor and sarcasm into your presentation. Alter the pitch of your voice throughout the presentation. No one wants to hear you speak in a dull, monotone voice. You can lose several of your listeners with an unchanging pitch. Change the pitch to place emphasis on an important fact.
Use an outline to help you navigate through the important ideas and facts. Outlines can organize your information and help your delivery flow much more smoothly. If you get nervous and forget any information, an outline can serve as a reminder.
Dress the part. Wear attire that is comfortable and appropriate for the presentation and for the gathering. The proper attire indicates that you are serious and confident. Avoid colors that are too bright and hard to look at like neon colors.
Stand upright and use hand gestures to accentuate your points. Good posture and gestures implies confidence. Smile throughout the presentation. This denotes warmth and friendliness. Make eye contact with everyone in the room. If it is necessary to move around a bit to make eye contact with people in the audience, do so. Do not feel as if you have to constantly move about and make eye contact with everyone. You can stand still and engage the audience.
Use a visual aid. If you are presenting on a heavily statistic-based topic, PowerPoint with charts and graphs will help delineate the information.
Channel your nervous energy into concentration and excitement. This allows you to focus on your presentation and not the nerves. Visualize yourself giving the speech before going into the classroom. Go over what you are going to say and how you intend to interact with the audience in your mind. Take pauses for moments when you feel like your about to stumble to collect yourself if you get too nervous. Take a drink of water and take a deep breath. Affirm in your mind that you will finish the presentation.