So let's start off by saying that I'm not an instructor, but looking to help a friend.
We just got back from a ski weekend with another couple. The wife had never skied before and decided this time that she wanted to try it. We set her up with the beginner package (ticket, rentals, one hour group lesson). It wasn't very busy and that one hour group turned into a one hour semi-private followed by a one hour private with a great instructor who even refused a tip after spending so much voluntary time with her.
Anyway, when we met up with her after the lesson, she was riding the beginner chairlift and coming down the short flat bunny hill in a nice gliding wedge. I spent a few runs skiing with her trying to help her practice and continue improving. Basically just skiing backwards slowly and having her follow me. Giving basic reminders of where she should be pressuring her ski to make the right turn to follow me. She was having fun and getting more confident, but the real problem was that she seemed incapable of really engaging her inside edges. Basically, she'd be pointed straight down the hill in a wedge and could pressure one ski or the other to kind of drift back and forth across the hill while still being pointed straight down. Watching her I could see she was trying to make the right motion but didn't seem to be able to tip the ski enough. Knowing she'd taken up running last year, on the second run I asked her if there was anything special about her running shoes and she said she had special ones that were supposed to compensate for the fact that she normally walked almost entirely on the outside edge of her foot. Sounds like we've identified the cause of our troubles.
So of course the obvious thing to do would be buy boots and have a boot fitter make the same kind of adjustments to the ski boots. But this was her first time and she's not ready to drop hundreds of dollars on equipment until she's sure she likes it. So my question is whether there's anything that can be done on trip two while still in rental boots that can help her progress further. I think if she could get past this small problem she'd be capable of tackling slightly more difficult greens from the top and that would open up a lot. She would be taking another lesson, but I'd like to be able to offer some more help while she's practicing afterward.
I did suggest she take a look at those running shoes to see if the special part was a removable insole she could stick in the rental boots.