I don't know about snowplow. It still is a fundamental technique of skiing - basically, there are always those times when you need to snowplow for whatever reason.
That said, there is a drill you can start with, which teaches parallel turns pretty quickly for many people, and that is learning to pivot both skis, parallel, from 90 degrees across the fall line to the opposite 90 degrees, repeatedly, as you travel slowly down the slope. You'll be just standing upright, it helps to have arms out to the sides, to reinforce that the skis need to match the position of the arms (90 degrees) at the end of each pivot and the upper body needs to be pointing down the fall line the whole time. As you become expert at this drill, you can actually go beyond 90 degrees, to about 100 or so, with the ski tips actually pointing a bit uphill.
The goal is to link slow, skidded pivot slips with the same amount of physical effort throughout the entire pivot and constant speed throughout the cycle. You'll start on the greenest of the green trails, but this same drill can be done on black diamond trails. So this is just to teach ankle steering and counter-rotation at the waist, and the idea that the upper & lower body need to move independently. Angulation and edging and carving can be taught later...
Edited by pedestrian (01/19/09 03:55 PM)