tdk6, et al,
I was thinking along a slightly different line. Suppose the skier is in a wedge, and is moving straight downhill. They begin to pressure the left ski, and start to turn right.
There are two cases to consider: either the right ski has pointed straight downhill, or it has not.
I suggest that this skier should begin to close the wedge ONLY when the right ski is pointing straight downhill.
Why? Because if you wait until the right ski is pointing down the fall-line, the tail of the right ski can simply be rolled to the new edge and skied up beside the left ski. If you try matching sooner, the danger is that the skier will lift it to get the tail to disengage.
Of course, the goal is earlier and earlier but what I'm on about is the very first matching attempts. Well before they have the coordination to twist and roll to acheive early matching.
I think that waiting until the inside ski is pointing straight downhill will guarantee a round turn, regardless of the size of the wedge -- at least it did for my experiments today. It will also keep the right ski on the snow. It will give them patience to wait for the ski to turn.
I think it also gives the beginner a target moment to coordinate an action. It's very sequential, and the timing is simple get. It introduces the notion in a safe way. The round turns and patience is free....
It also dovetails into the initial steering angle thread.....