In the next place, the teacher must not disappoint the attention which his manner has challenged. He must have something valuable to communicate to the expectant minds before him. He must be thoroughly prepared in the lesson, so that the pupils shall feel that they are learning from him. His lips must keep knowledge. The human heart thirsts for knowledge. This is one of its natural instincts. It is indeed often much perverted, and many are to be found who even show aversion to being instructed. Yet the normal condition of things is otherwise, and nothing is more common than to see children hanging with fondness around any one who has something to tell them. Let the teacher then be sure to have something to say, as well as determined to say it. In the third place, the teacher must have his knowledge perfectly at command. It must be on the tip of his tongue. If he hesitates, and stops to think, or to look in his book for the purpose of hunting up what he has to tell them, he will be very apt to lose his chance. Teaching children, particularly young children, is like shooting birds on the wing. The moment your bird is in sight, you must fire. The moment you have the child's eye, be ready to speak. This readiness of utterance is a matter to be cultivated. The ripest scholars are often sadly deficient in it. The very habit of profound study is apt to induce the opposite quality to readiness. A teacher who is conscious of this defect, must resolutely set himself to resist it and overcome it. He can do so, if he will. But it requires resolution and practice. In the fourth place, the teacher must place himself so that every pupil in the class is within the range of his vision. It is not uncommon to see a teacher pressing close up to the scholars in the centre of the class, so that those at the right and left ends are out of his sight; or if he turns his face to those on one side, he at the same time turns his back to those on the other. Always sit or stand where you can all the while see the face of every pupil. I have, hundreds of times, seen the whole character of the instruction and discipline of a class changed by the observance of this simple rule.