Not long ago a candidate for the presidency of the United States delighted an audience of ten thousand or more in the Salt Lake Tabernacle by his remarkable handling of questions and comments thrown at him from that vast audience. There was no hesitancy or uncertainty. He spoke "as one who knew." He was prepared. He had so lived with the questions of the day that they fairly seemed to be part of him. The interesting teacher never teaches all he knows. His reserve material inspires both interest and confidence. A class begins to lose interest in a teacher the moment they suspect that his stock in trade is running low. The mystery, "how one small head could carry all he knew," is still fascinating. Thorough preparation, moreover, minimizes the likelihood of routine, the monotony of which is always deadening. A class likes a teacher--is interested in him--when it can't anticipate just what he is going to do next and how he is going to do it. A further aid in holding interest is to know intimately the life of the boys and girls taught. To appreciate fully their attitude--to know what sort of things in life generally appeal to them--is a very great asset to any teacher. If a teacher knows that a boy's reaction to the story of the Israelites' crossing the Red Sea is that that story is "some bunk," he is fortified in knowing how to present other subjects which are similar tests to a boy's faith and understanding. To know pupils' attitudes and mode of life is to know what sort of illustrations to use, what emphasis to put upon emotional material, what stress to lay on practical application. In short, it is to know just how to "connect up." It stimulates to a testing of values so that a teacher selects and adapts his material to the needs of the boys and girls whom he teaches. And, finally, as a key to interest, a teacher needs to know what the "factors of interestingness" are. According to the findings of the Public Speaking Department of the University of Chicago, they are summed up in these seven terms: The Vital The Unusual The Uncertain The Concrete The Similar The Antagonistic The Animate This list becomes more and more helpful as it is pondered. It is surprising to find how experience can be explained on the score of interest by reference to these terms. Those things are vital which pertain to life--which affect existence. Dangers are always interesting. Catastrophies are fascinating. Just today all America is scanning the newspapers throughout the country to find an explanation of the Wall Street explosion. We shall not soon forget the feverish interest that gripped the people of the world during our recent world wars. When life is at stake, interest runs high. So it does when property, liberty, and other sacred rights, so vital to life, are affected. Anything vital enough to justify the publication of an "extra" may be depended upon to grip the interest of men and women.