THE TEACHING OF CHEMISTRY 39

 (c) Plan details of trips, such as transportation, time
 required, arrangements for guides, well in advance
 of trip.
 (d) Prepare class for points of interest and application
 of these to chemistry.
 (e) Have a complete "follow-through" of the trip by
 reports, discussions, and the like.
 11. Take advantage of current happenings as they apply to
 phases of chemistry in order to arouse new interests.
 12. Have students exchange letters and collections of local
 materials with students of chemistry classes in other
 localities.
 The laboratory-where interest expands. Laboratory work is
primarily to develop spe-
cific skills and to motivate IN THf ~- A
learning. Laboratory expe-
riences properly guided will
also result in habits of re-
sourcefulness, responsibili-
ty, honesty, neatness and
respect for other people's W HER
property and for school
property. Naturally the
alert teacher will adapt lab-
oratory procedure to the
size of the class, and to the
facilities and equipment at
hand. Often students can
be trained to assist in the
maintenance and operation
of the laboratory. Students /
will learn better if special
attention is paid to effective
presentation of subject
matter by careful planning
of the sequence of explana- 'L
tions, class discussions, and & PXN D I
laboratory experiments.