I've taught several snowboarders how to ride and the teaching process is about putting them in a position where they forget about the distracting things.

Always start them on a blue (or blue-black) slope, because it forces them to learn to use the edge of the board. Lot of easy drills like side slipping and simply turning your head to control direction.

If you start a snow boarder on a green run, it always results in them catching an edge and eventually face planting. Not a fun experience.