I agree Chris that drag setting is about "feel" based through experience, it 's easy to understand for old farts like us what you mean. Turn the star ---> pull, turn the star --- > pull and repeat as needed until it "feels" right, nothing fancy, no rocket science involved, just plain ol trial and error based in our experience...... but how long it took us to find the right ammount of pressure ?
I see nothing wrong with the method exposed by Matt, and it 's a good way to start developing the habit of properly setting the drag to the right ammount of pressure until they develop the ability of finding the point when it "feels right".
Also, 99% of the people don 't have any idea what kind of drag their reels have, Shimanos are completely different from Daiwas; Shimanos have "wet" drag systems while Daiwas have "dry" drag systems, and both even though designed to perform the same duty have two different approaches and both "feel" different.