the "insides" of a machine, and the processes of assembling, with
their attendant problems of adjustment and co-ordination of mechanical
movements, afford opportunities for the best kind of practical
instruction. One of the great advantages of this type of shop work
lies in the fact that it consumes little or no material and is
therefore inexpensive; another is that a fairly extensive equipment
can be easily obtained, as any machine, old or new, will serve the
purpose and may be used over and over again.

The extent and variety of shop equipment will depend largely on the
resources of the school system. The more the better, so long as the
money is expended on the principle of the greatest good to the
greatest number, which means that the kinds of tools and equipment
used in the large trades should be preferred to those used only in the
smaller trades.

In order that the time devoted to shop work may yield its greatest
results, it is necessary that every lesson center around knowledge and
ability that will be of real subsequent use to the pupils. It must not
run to "art" and it must not be mere tinkering. Its principal value as
vocational training, in the last analysis, lies in its use as an
objective medium for the teaching of industrial mathematics and
science.


VOCATIONAL INFORMATION

During the second and third years all the boys who elect the
industrial course or who expect to leave school at the end of the
compulsory attendance period should be required to devote some time