i hate public speaking, but evry time i ahve to do it it turns out much better than i'd anticipated, and poeple forget about it straight away - you're the only one who remembers. try and give it a go as getting through situations you're scared of is what helps you get more confidence.
if you can do a power point presentation or a slide show with lots of visuals people will be looking at that and not at you.
or you could have a relevent video on silent while you're talking to take focus off you. if you do something like this you could also have the lights off so people can see the image better and this may make you more comfortable.
you could work discussion topics into your talk and get debates going on issues you bring up. i don't know what the subject of your talk is, but you could bring up issues and breifly present two sides to each issue, and then ask people what they agree with and why - something along those lines may stimulate discussion and also get the teacher involved too.
if you bring up controversial things this will be more likely to pique interest and get people's input as well as the teachers.
my advice would be to make the talk as interesting as possible, because then people will be engaged with your content and start to think, wheras if it's boring and you're jsut regurgitating things they already know they will focus more on you.
if you have an organised slide show, and cards to read from this should take alot of pressure off.
good luck, and remember most people aren't looking out for negatives, they are just happy that they don't have to do any work while you're talking.
p.s. i just remebered, in high school a friend and i who both hated public speaking had to do a talk, and we talked to the teacher about how hard we found it, and she let us do it at luch time in front of an audience of only about 3 friends that we brought along. so maybe you could ask to do something likt this!