Science Buddies: "Ask an Expert"

I am in ninth grade, and am doing a physics experiment that I found on this site: Measuring Sugar Content of a Liquid with a Laser Pointer. Site: https://www.sciencebuddies.org/science- ... p028.shtml
I am having a very difficult time understanding the procedure and rewriting it into simple, orderly steps. Could someone please translate the procedure into a more understandable, simple context? Thank you!

If you follow the links from the sources section of the write-up you will find examples of how others have organized their reports. Hope this helps!