A quick training technique is to get the student to do complete pedal turns with only one foot on the pedals.
That would be considered negative training in many circles - like teaching them to hover without one hand on the collective.
Better to practice slow speed manoeuvering flying figure of 8s over an airfield/field with 10 to 15 kts of wind to deal with. Do it at a sensible height - ie not at 5 ft - and they will soon learn how to deal with weathercocking.