b. Building of a house or mechanical details of any trade.
c. Topics in geology such as formation of coal, marble, etc.
C. Beyond powers of pupils.
a. Form of earth, relation of bodies in solar system.
b. Rotation and revolution of earth.
c. Theory of storms.
4. Summaries:
A. Must be simple and easily drawn from previous work.
B. Must be of such a nature that they can be expanded as years go on without overturning base learned in earlier years.
C. Examples of good summaries: