Falls will happen. Usually they happen when people "panic" So when teaching beginners, a couple things.
1. Remind them we are not splitting atoms and there is NO pressure. Relax and laugh at yourself.
2. Remind people NOT TO LOSE THEIR COOL. Most people "crash" when they panic. The never-ever hill at our mt has a HUUUUGE run out. There is nothing to hit and is is FLAT. Tell them to remain calm, pressure one side of the pizza with their big toe, and see what happens. (Doesn't matter which toe - just pick ONE and stick with it.) DONT CHICKEN OUT and you won't wipe out." I usually ask students to "Promise me one thing. Be cool. You look cool. Can you keep your cool?" This usually elicits a laugh. When they start to lose it and pull it together for the save, praise lavishly!
3. When up on the hill with better skiers and the inevitable tumble happens (Thanks rental shop for the 5 DIN for a 200# dude.) Make sure to have the tumble-ee sit for a moment. Let them catch their breath and take a moment to look out at the valley below them and enjoy where they are and what they are doing. Let the adrenaline dissipate, buckle them back up and re-arrange their equipment (It is better to look good than to ski good.) Another joke and off you go.
Finally, when they do fall. SHOW them how to GET UP. NEVER NEVER NEVER lift them up. This is a recipe for pulls and strains to YOU. Tweaked knee or back and you are done for the day/week/season. Be kind. Sympathetic. Tell a joke. Pop off the skis for them. DON'T LIFT THEM. Half of our adult never evers are from warm countries and many of them have never seen snow. They do not understand "slippery" and many have zero upper body strength. Odd for a country that invented Yoga but that is how it is. At least they are out trying skiing!