However there is the Law of Primacy that states as an Instructor I
should teach the right way from the beginning

Like =all= things, this is not absolute.

Sometimes colloquialisms are very useful learning tools, inasmuch as
they convey the essential meaning (once established) without the
formalisms that interfere with processing. If we are learning airport
and airspace classification, then it is necessary to be pedantic and
verbose, to ensure correctness. However, once that is understood, when
one is teaching something else, it is better to refer to a concept by
its abbreviated form than to continue to distract the student with
irrelevant pedantry.

Also, some terms change. You need to know all variations.

Jose
--
Money: what you need when you run out of brains.
for Email, make the obvious change in the address.