For me:
Spins (exercise 11?)
Precautionary landings (ex 17)
There's the quality/quantity argument.
Do you teach all the syllabus, but not very well?
Do you teach most of the syllabus and do it really well?
Or should you teach all the syllabus and give the the student pilot a good grounding, before going off to the flight test?
Luckily, due to wx in part, I did the latter with experienced instructors. Pays to ask if you can do x/y/z exercise in the book too.
There's the old RAF ATC saying: "don't ask, don't get"
