I do a couple of clinic type things - a developmental league one day a week and then the "instructional league" another day.
For the most part, what I find is that while they do have us doing drills to practice the skills, most of it is NOT geared towards actually teaching people how to do the moves necessary. It's more "here's a drill - I want you to do a crossover when you get here, then skate this far, do another crossover here." But there are some of us who are still needing to be told the actual mechanics of HOW to get the crossover to work before we can run drills that require them.
I remember one of the classes about the 2nd week of the season for the D-league. The coach set up some tires or cones and said 'OK, now I want you to take a couple of strides, pivot, and then continue backwards to this tire. Then do a couple of crossovers to get to the boards, then a couple of backwards crossovers to get out to the next tire. Pivot, grab the puck, take it to the end and take a shot on the net."
About 4 of us turned and looked at each other and said "Backwards. He wants us to go backwards. How exactly do you do that?"
Pretty much all of us had tuned out about 15 seconds into the explanation because we quite simply didn't know how to go backwards! We needed to be told how to stand, where the weight should be on the blade, how to push, what edge to use, etc. before we could even begin to do the drill.
There is one coach that I've worked with who is excellent for this sort of thing - when we were learning how to transition forwards to backwards, he actually explained it and showed us - he said "put the weight on this part of the blade" and we started doing little circles in place, just by changing where the weight was on the blade. Then he had us take a couple of forward strides and then do the same thing. Then it was on to actually getting some speed up, then doing the pivot. Everyone got it, because we knew HOW to get it. It wasn't just "well, you just kind of turn around really fast" but an actual explanation. Unfortunately, I can't really go to his classes all that often now that the starting time has been pushed back.
With the crossovers, I was having trouble getting them at all. Once I really started to focus on PUSHING the leg under the other one rather than just balancing on it, it got a lot easier. I'm still not great at them (and can only just barely do them the other direction) but it made all the difference in the world to be USING that blade to go somewhere rather than just gliding on it and hoping the other foot would fall into place over it. If I had been told by someone "hey, why don't you try actually pushing that blade under your body instead of flopping over like a teeter totter" I could have cut the learning time in half, easily.