A recent thread brought this to light and I'm curious as to what has been done for skiers to help their skiing ability.
Mind is preventing the next progression (ie. fear)
Body issues your body is causes to make skiing difficult (ie. one leg shorter)
Technique (should be self explanatory)
Equipment....boot fitting, edges, wrong skis etc.
If you can make comments as to the problem(s) and the fix(es) along with who made them.
BTW instructors (casual) are friends/family or other well meaning skiers who are not trained as ski instructors.