i agree with the other posters: try to be the first or second
, so that you can get over it sooner, and won't have to sit there getting more anxious waiting your turn. practice (out loud!!),
in your room, or in front of your friends, or in front of your family, or wherever, until you almost know it without reading it (at least the major parts)
like the other poster said, remember, all the other guys are sitting there worrying about their own papers
!!! believe me!!
before you actually do the present, do some "relaxation /calming breathing"....SLOWLY, breathe in from the diaphragm/abdomen, while counting up to 6 (or more if you can) and watch as your stomach expands; stop; count to 6; release the breath slowly through your mouth, while counting to six (or more). make sure you release all of the breath!!!
do this breathing (making sure your stomach sticks out when you breathe in), a few times...very slowly. it does help, believe me. try it sometimes before you actually do your presentation, and see if it works for you.
i was exactly the way you say you are, all thoughout school, up to college. in grad school i got used to it, since they had us do more of these things as well as so called self-awareness classess where we had to sit in small groups and talk about ourselves...now that was really a wondrous experience (sarcastic)...no, but seriously...it will be fine!!
let us know how it went.
also, remember, you may feel worse than you think you may look to others.
it's also perfectly fine to say that you're a bit nervous when you start (i used to say that all the time...and it gave me more room to make mistakes, and to be nervous)....
plus, i think if your teacher sees the effort you put into it, she/he will be cool with you!!
ultimately, if you think this is something you absolutely cannot do, explain it to the teacher. don't be embarrassed. many pple have this issue. millions of them. ask if you can do something else to make up that part of the course grade. maybe?!!! just an idea.
the best of luck to you!!!