Great tips for sure, especially when learning! I also teach carving to kids in a little older age bracket but the same applies. Over the years it amazes me how many kid's AND adults who want me to sharpen their knives... like I have some supernatural powers to sharpen, because I'm the teacher I suppose.
In recent years I have gotten completely away from this because it's most definitely a sign of laziness on the learner's part but I will always take the time to teach them. In all the beginning carving classes I've taught I spend at least the first half of the class teaching how to sharpen knives. It is an essential skill to master if you're serious about learning to carve.
I like the tip about feeling the carving with your eyes closed to learn more about what you need to do. I'd bet that Helen Keller would strongly agree about how you can learn to "see" with all your senses.
Thank's for the tips!