=Characteristics of the Method.=--The third, or developing, method of directing the selecting activity of the learner, is so called because in this method the teacher as an instructor aims to keep the child's mind actively engaged throughout each step of the learning process. He sees, in other words, that step by step the pupil brings forward whatever old knowledge is necessary to the problem, and that he relates it in a definite way to this problem. Instead of telling the pupils directly, for instance, the teacher may question them upon certain known facts in such a way that they are able themselves to discover the new truth. In teaching alluvial fans, for example, the teacher would begin questioning the pupil regarding his knowledge of river valleys, tributary streams, the relation of the force of the tributary water to the steepness of the side of the river valley, the presence of detritus, etc., and thus lead the pupil to form his own conclusion as to the collecting of detritus at the entrance to the level valley and the probable shape of the deposit. So also in teaching the conjunctive pronoun from such an example as: He gave it to a boy _who_ stood near him; the teacher brings forward, one by one, the elements of old knowledge necessary to a full understanding of the new word, and tests at each step whether the pupil is himself apprehending the new presentation in terms of his former grammatical knowledge. Beginning with the clause "who stood near him," the teacher may, by question and answer, assure himself that the pupil, through his former knowledge of subordinate clauses, apprehends that the clause is joined adjectively to _boy_, by the word _who_. Next, he assures himself that the pupil, through his former knowledge of the conjunction, apprehends clearly the consequent _conjunctive_ force of the word _who_. Finally, by means of the pupil's former knowledge of the subjective and pronoun functions, the teacher assures himself that the pupil appreciates clearly the _pronoun_ function of the word _who_. Thus, step by step, throughout the learning process, the teacher makes certain that he has awakened in the mind of the learner the exact old knowledge which will unify into a clearly understood and adequately controlled new experience, as signified by the term _conjunctive pronoun_.