Here is a heretical thought. Given the, on average, once a month carb ice induced engine failure and resultant forced approach maybe ground school less time should be spent on the theory of compass errors and more time on
recognizing the symptoms of carb icing and knowing those conditions when it is most probable
BPF,
For me nothing heretical at all about it - I've been teaching such for decades.
There is a huge difference between doing things right and doing the right thing.