Most martial art schools have mirrors on the walls; it is as if
there is some unwritten requirement for it. Reasons mirrors are
useful to instructors - Give instructors "eyes in the back of
their heads." - Allow instructors to watch students when they do
not know they are being watched. Students tend to get nervous
and make mistakes when they know they are being watched by the
instructor. Mirrors allow instructors to watch students in their
more relaxed state. - In children's classes, they allow
instructors to catch students in bad in bad behavior when they
students think they are not being watched. - Let instructors see
the entire class even when not facing it. Some instructors are
so adept at using mirrors that they can spot a mistake in the
movement of a student's pattern, even though the movement image
is reversed in the mirror. - Let instructors watch spectators,
the lobby, or the entrance while they looking the other way.
This keeps them aware of visitors, customers, or prospective
students. - Make a sp