at will still further
eliminate waste.

OBJECT-LESSON MAY BE "WORKING MODELS."--The object-lesson may be
a "fixed exhibit" or a "working model," "a process in different
stages," or "a micro-motion study film" of the work that is to be
done. Successful and economical teaching may be done with such
models, which are especially valuable where the workers do not speak
the same language as the teacher, where many workers are to perform
exactly similar work, or where the memory, the visualizing and the
constructive imagination, are so poor that the models must be
referred to constantly. Models naturally appeal best to those who
take in information easiest through the eyes.

OBJECT-LESSONS MAY BE DEMONSTRATIONS BY THE TEACHER.--The
teacher may demonstrate the method manually to the worker, or by
means of films showing synthesized right methods on the
motion-picture screen. This, also, is a successful method of
teaching those who speak a different language, or of explaining new
work,--though it calls for a better memory than does the "working
model," The model, however, shows desired results; the
demonstration, desired methods.

DEMONSTRATION METHOD CHIEF METHOD OF TEACHING BY FOREMEN.--The
manual demonstration method is the chief method of teaching the
workmen by the foremen under Scientific Management, and no method is
rated as standard that cannot be successfully demonstrated by the
teacher, at any time, on request.

WORKER MAY DEMONSTRATE UNDER SUPERVISION.--If the worker is of
that type that can learn only by actually doing the work himself, he
is allowed to demonstrate the method under supervision of the
teacher.[8]

TEACHING ALWAYS AVAILABLE UNDER SCIENTIFIC MANAGEMENT.--Under
Scientific Management all of these forms of teaching are available
constantly. The instruction card and accompanying illustrations are
given to the worker before he starts to work, and are so placed that
he can consult them easily at any time during the work. As, also, if
object-lessons are used, they are given before work commences, and
repeated when necessary.

The teacher is constantly available for oral instruction, and
the systems are constantly available for consultation.

METHODS OF TEACHING UNDER SCIENTIFIC MANAGEMENT PSYCHOLOGICALLY
RIGHT.--In order to prove that teaching under Scientific Management
is most valuable, it is necessary to show that it is psychologically
right, that it leads to mental dev