I'm assuming by the way your post is worded that the presentation is done and you are only asking for tips on giving it.
What I found beneficial is to print off the slides for the presentation and take them with you where ever you go. Practice what you want to say in your head when you have free time. I've found that doing this will usually give me several ways to say the same pieces of info and my brain has an easier time grabbing one of those phrases during the live presentation.
Find a laser pointer, preferably one that can act as a remote to the pc. It's nice to be able to move through slides without having to walk to the pc. It also looks bad if you have to wander up to the board and point with your finger.
Unless you are pointing out something specific on your slides (with your laser pointer), you should be facing and talking to the audience. You don't need to focus on a specific person.
Since this is for a class, expect dumb questions or people trying to show off in Q and A. Not much you can do there, just a fair warning.
I've given a number of profesional presentation at conferences and symposiums in addition to quite a few talks during weekly meetings. Even with all that experience, I still find that my hands shake a bit before I go up. One time it was so bad during an international conference that I had trouble hooking the mic to my belt and collar. But with a deep breath and all the practice, I can give a talk with no quiver in my voice or stutter. I even look excited about the topic when I talk now. Unfortunately, a lot of that is experience giving talks.
If your presentation isn't complete yet, I have some thoughts/recommendations.
1) The slides are your notes for you talk. They should have the bare minimum of words needed. You should never be looking at the slide and reading word for word off of it.
2) I hate leaving a talk without knowing why I should even care about the topic. A motivation slide is nice after the background on the topic.
3) Know the amount of time you have to fill. In general, 1 slide = 1 minute. So don't have 40 slides for a 15 minute talk. If the class presentation schedule is tight, you can lengthen your talk to take up a portion of the Q and A so that you might get 1 or 2 questions.
4) Stick with basic slide layouts and good font size. Example below:
In general, I like people to notice pictures before the text so stick with pictures on the left and text on the right or pictures at the top and text on the bottom. If no pictures, align text to the left top corner. Basic also means none of those terrible slide transitions. Have the slides numbered so they are easy to refer back to during Q and A.
That turned out to be more text than I was thinking and might have been way more than you were asking for.
I'm sure I can think of more stuff given time but that's what I have off the top of my head.