John H. Campbell wrote:
..... So, in teaching, why not
stress monitoring methods first -- primarily visual (yaw string staring
in the face for just that purpose)


Mostly because if you do that from the start, the student will focus on
the yaw string and drop everything else (an exaggeration, but you get
the point). I think that Piggott may have it right when he says that the
yaw string is most useful for long straight glides - to ensure that you
have no inadvertent slip. I tell students about the yaw string, of
course, but I also say that I can tell if their turns are coordinated
with my eyes closed because my shoulders won't move.

Tony V.