Hi Folks:
Been a very long time since I actively instructed, but one vivid demonstration regarding proper spin recovery technique involved getting a Cessna 150/152 into a fully developed spin of two or three turns with some power on and then using full counter-spin aileron inputs.
It'll REALLY wind up then! Never had any student or Instructor Rating trainee not appreciate that co-ordinated controls were required after stopping yaw/spin with rudder and forward stick input.
Regards,
Fog