Perhaps he says not a word about it, but his pupils see that he is submitting to the control which is placed over them; and when the card goes up, and he stops instantly in the middle of his sentence and rises with the rest, each one to go to his own place, to engage at once in their several duties, he teaches them a most important lesson, and in the most effectual way.

Such a lesson of fidelity and obedience, and such an example of it, will have more influence than half an hour's scolding about whispering without leave, or a dozen public punishments.

At least so I found it, for I have tried both.
Show then continually that you see and enjoy the beauty of system and strict discipline, and that you submit to law yourself as well as require submission of others.
(6.) Lead your pupils to see that they must share with you the credit or the disgrace which success or failure in the management of the school may bring.

Lead them to feel this, not by telling them so, for there are very few things which can be impressed upon children by direct efforts to impress them, but by so speaking of the subject, from time to time, as to lead them to see that you understand it so.
Repeat, with judicious caution, what is said of the school, both for and against it, and thus endeavor to interest the scholars in its public reputation.

This feeling of interest in the institution may very easily be awakened.