My master taught me by demonstration, sitting down next to him; he would explain what he was going to do. From teaching me how to sharpen the gravers, how to cut, what types of gravers to use and why, types of metal. For me that is how I learned. You learn by your mistakes and I had plenty of those. The type of lathe is very important. You have to know the lathe; I had a foot control which helped a lot. I started by cutting a very large balance staff, working down to a Pocket Watch size and finely to a small cal Ladies watch. It was a Lathe made by Boley. Don’t forget back in the early 70’s we didn’t have computers to help you out with the measurements you had to know the math. Pocket calculators were only just coming on the market. I do sound out of date.
I wish you luck. I know teaching a class is different to what I have added. This might help in some way. I used to teach IT many years ago to uninterested didn’t want to work students, at least you will be in front people willing to learn and will find the subject interesting.