Lots of people are afraid of speaking in public. According to a study, there are 3 of every 4 people having such a problem. The conclusion is a bit surprising and worrying, as most jobs require some speaking ability. The following will help you to make a speech better.
Write note cards. Write main ideas on your cards. You needn't write details. Just put in some fun facts, questions, and other activities on the cards to share with the class. You needn't look at your cards for a long time while speaking. Only have a quick look at the card for information instead of reading every last word if necessary.
Smile at your class. When it's time to speak, a good old-fashioned smile is the best to draw your class into your speech. Be happy, because you're about to teach your class something they don't know before. Studies have shown that smiles are infectious. That means once you smile, it's hard for everyone else not to smile. So if you want your speech to go off well, smile. That will make everyone smile and maybe those smiles will make you actually smile.
Make eyes contact. It's so boring to listen to a speaker who looks at the floor or at note cards. Relax. Your class is made up of your friends and you talk to them all the time. Talk the same way now. Have a look at every person in the classroom at least once. That way, everyone will feel like you're communicating with them. Also, you'll look like you know what you are talking about.
Use hand motions. Move you hand along as you talk, using them to express your key points and keep the class interested. It will also lead your nervous energy into a better place.