do you hang out in a mumble? give the speech to people in that mumble a few times. than just imagine you are in that mumble when you are in class giving the speech. Sometimes looking at the teacher can be a little less nerve wracking and the teacher will think you are giving great eye contact. If you have any good friends in the class look at them too. The more you can look at things that don't make you nervous (aka don't look at people you don't know) the better you might do.
I would also listen to ukm.