Teleprompters are what news reports often use to know what to say. It displays a script that you input and the speed can be adjusted to your natural speaking speed. There are apps for this on both iPhones and MacBooks, and probably on other phone and computer brands as well. There are also website programs for computers that do not have an applications (just do research before downloading due to potential viruses).  

If you are using Zoom or a similar program to give a live presentation, use the app on your computer with both tabs open or you can get it on your phone and lean your phone against your computer screen. 

If it’s not a live presentation, use one of the apps to record your presentation. Most have a video recording option that plays the script at the same time. 

I hope this helps someone stressing about a presentation! It helped me a lot.