Two tips no one has mentioned
1) Breathe. It will help calm your nerves and keep yourself from that redness.
2) Relax. Speed will only hurt. You will feel uncomfortable. You will go in with the "umms" and "yeahs". It will come out worse than if you go slower. By doing your presentation slower, you will get to a point where it will just flow out i.e. feel natural.
This is Speech Class. The goal of the class is to get you to speak properly and to get you over public speaking. Everyone in your class is in the same position. They all will give presentations. Everyone will have to speak. No dodging it. There will be plenty just like you scared to death. This is your practice for the work place.
As for who to look at... Peak. Just peak around the room as you speak. Don't stare at any individual. Scan the room.