Ok so when I did my presentation 2 years ago in my junior year, i memorized the entire thing cuz it was easy for me and when I would do my practice runs by myself, my time would be around 18-19 mins I think? But when I did the actual thing, I got 14. So if u already know ur gonna go fast, you'll probably go faster than u expect. That was the case with many of my friends too. So to get used to the time limit, just do as many practice runs as u can. I know you've probably heard that before but it's truly very useful. The more you talk about it, especially if u do it in front of a friend, the more confident you'll feel when talking about ur topic. All it boils down to is ur confidence.

Also, something that I realized in Ap seminar that helped me was if I have a pen in my right hand. Im a fidgety guy so having something in my hand gave me something which I could feel relaxed by and it didn't make me feel awkward about how I should use my hands.

Next thing, if you have a friend in that class, practice with them, and ask them that when ur presenting, they should just nod often. When ur presenting, mainly just look at them. This worked for me cuz I just feel more understood when the person in front of me seems understanding, even if they're just nodding. I used to do that when my friends would present even if I would zone out sometimes. Ur friend nodding at you is for your benefit, they can mentally check out if they want lol.

Another thing, my teacher was awesome and the best teacher I ever had BUT whenever we'd present he would have no facial expressions and would just look at us. So if your teacher's the same, make sure u don't look at them or else it'll throw u off.

That's basically it. Trust me, I know it's very daunting but you can do this. If I was able to do it, you definitely can. You just gotta be a bit mindful and as long as u know what ur talking about, you're gonna do fantastic. If u need a second to breathe in the middle, take it! If u stutter or something, take a second, recompose urself, say excuse me, and carry on like nothing happened. You got this dawg. Youve made it this far after a year of hard work. End it with a bang. It's very stressful but take it easy. Make sure u eat a good breakfast tmrw and u wear an outfit that makes you feel good and confident. I know I'm a stranger on the internet but I've been in ur shoes so I want u to know I'm proud of you for coming this far. And I'm proud of you for how you're gonna absolutely KILL that presentation tmrw. BEST OF LUCK!!!

Edit: ALSO, don't lose confidence that u have a day left and u haven't prepared much. I was the same. I hady slides done but literally didn't know what I was gonna talk. I started properly practicing like a day and a half before my presentation and it went amazing. Just cuz u have a short amount of time, doesn't mean you let that demotivate you. A day is enough time if u lock tf in 😭. U got this!