Nolo, I was going to put in a quick answer which is, teach the student (i.e. me) what I need to learn to make my skiing progress.
But that leads on to the question:
What does the student need to learn?
Obvious answer: ask them.
But that isn't necessarily correct, and now I delve into my sales management classes. It's not what the customer thinks they need, it is what you, as a professional see as their real need. In DPS terminology, this is called "finding the gap"
So, a personal example...
I remember being asked by an instructor once what I wanted to learn. My reply was "to carve" I was convinced that was what I should learn, because I thought that was where my failing was.
He then watched me ski, and told me he wouldn't teach me to carve.
I was disappointed.
What he said he would teach me was how to improve my balance.
I thought my balance was OK, but my problem was carving.
He got me to "feel" my feet better (can't remember the proper words for it, so bear with me). So it was about using slight pressure changes, and what parts of my feet to apply the pressure with.
We never once talked about carving, just all this stuff about balance, and then at the end of the lesson we had a high speed run with me following him.
All of a sudden, I realised I was carving properly!
My perception of my problem was wrong, but his solution made the problem go away.
The real fun bit wasn't the lesson, but the discovery at the end of it, and it felt like it was my discovery, and not something he taught me, so I found the answer "all by myself", or so it seemed.
And wasn't that the fun thing about doing chemistry/physics experiments in school. The teacher told you to add NaOH to HCl, but you were the one who made salt and water. It was your experiment and your results, and you felt like you were the first one to do it.
So, where was I,
Oh yes, teacher, find out what the student thinks they need, then look to see what they really need. If by doing one, you solve the other, you'll have a happy student. Or you will if you're teaching me!