unctionalizing the oral teaching, by using it merely as
a supplement to the written teaching, and by supplementing it with
object-lessons.

TEACHER MUST HAVE PRACTICAL KNOWLEDGE OF THE TRADE HE IS TO
TEACH.--The teacher must have an intimate practical knowledge of the
art or trade that he is to teach. The most profound knowledge of
Psychology will never be a substitute for the mastery of the trade,
as a condition precedent to turning out the best craftsmen. This is
provided for by securing teachers from the ranks of the workers.[7]

HE MUST HAVE A THOROUGH KNOWLEDGE OF THE STANDARDS.--He must
have more than the traditional knowledge of the trade that he is to
teach; he must have also the knowledge that comes only from
scientific investigation of his trade. This knowledge is ready and
at hand, in the standards of Scientific Management that are
available to all for study.

HE MUST BE CONVINCED OF THE VALUE OF THE METHODS HE
TEACHES.--The teacher must also have an intimate acquaintance with
the records of output of the method he is to teach as compared with
those of methods held in high esteem by the believer in the old
methods; for it is a law that no teacher can be efficient in
teaching any method in which he does not believe, any more than a
salesman can do his best work when he does not implicitly believe in
the goods that he is selling.

HE MUST BE AN ENTHUSIAST.--The best teacher is the one who is an
enthusiast on the subject of the work itself, who can cause
contagion or imitation of his state of mind, by love of the problems
themselves.

SUCH ENTHUSIASM CONTAGIOUS.--It is the contagion of this
enthusiasm that will always create a demand for teachers, no matter
how perfect instruction cards may become. There is no form or device
of management that does away with good men, and in the teacher, as
here described, is conserved the personal element of the successful,
popular Traditional foreman.

VALUABLE TEACHER INTERESTS MEN IN THE ECONOMIC VALUE OF
SCIENTIFIC MANAGEMENT.--The most valuable teacher is one who can
arouse his pupils to such a state of interest in the economic values
of the methods of Scientific Management, that all other objects that
would ordinarily distract or hold their attention will be banished
from their minds. They will then remember each step as it is
introduced, and they will be consumed with interest and curiosity to
know what further steps can be introduced, th