group in which there is such disparity of age. A working basis is
(13-14), (15-17), (18-20). This is but a foundation on which to work.
The correct grouping should be on a physiological basis instead of
chronological. A pupil ofttimes will not fit into a group of his or her
own age; physiologically, they may be a year or two in advance of the
rest of the class, and are mingling through the week with an older
group. Adjustments in such cases should be made so that the pupil is
permitted to find his or her natural grouping. Like water, they will
find their level.

Under no ordinary circumstances should classes be mixed (boys and girls
together).


=Class Names and Mottoes=

_Names._--A class name will help to create a strong and healthy class
spirit, and is valuable as a means of advertising the class and its
work.

Some prefer to take class numbers or letters, thus recognizing their
relationship to the Sunday school; others select names from the Bible to
indicate their relation to Bible study; others choose names that
indicate some kind of Christian service, thus committing the class to
Christian work; while others take names of heroes or use Greek letters.

_Mottoes._--A motto is perhaps more important than a name. It will help
to place and keep before the class a definite purpose. If often repeated
it will aid in producing in the class the spirit expressed in the motto.
The following well-known mottoes may be suggestive: We're in the King's