Here is a quickfix for coaches who are trying to help their young players with their skating. This will help you work with your players when they are trying to skate on their outside edge. It is important player learn to skate and push using their inside edges.
When you see players do this you can simply grab their skate and turn it so the player can feel their inside edge. If a player has been doing it for a long time it may take constant reminders from their coach to get back to their inside edges.