Authors:

The teacher should use illustrations for the better teaching of the lesson, and never to fill up time, to amuse the class, or to display his own genius.

"Dictionary of Burning Words of Brilliant Writers". Book by Josiah Hotchkiss Gilbert, p. 572, 1895.
The teacher should use illustrations for the better teaching of the lesson, and never to fill up time, to amuse the class, or to display his own genius.