Educational practice shows a continual tendency to oscillate between two extremes with respect to overt and exertive activities. One extreme is to neglect them almost entirely, on the ground that they are chaotic and fluctuating, mere diversions appealing to the transitory unformed taste and caprice of immature minds; or if they avoid this evil, are objectionable copies of the highly specialized, and more or less commercial, activities of adult life. If activities are admitted at all into the school, the admission is a grudging concession to the necessity of having occasional relief from the strain of constant intellectual work, or to the clamor of outside utilitarian demands upon the school. The other extreme is an enthusiastic belief in the almost magical educative efficacy of any kind of activity, granted it is an activity and not a passive absorption of academic and theoretic material. The conceptions of play, of self-expression, of natural growth, are appealed to almost as if they meant that opportunity for any kind of spontaneous activity inevitably secures the due training of mental power; or a mythological brain physiology is appealed to as proof that any exercise of the muscles trains power of thought. [Sidenote: Locating the problem of education] While we vibrate from one of these extremes to the other, the most serious of all problems is ignored: the problem, namely, of discovering and arranging the forms of activity (_a_) which are most congenial, best adapted, to the immature stage of development; (_b_) which have the most ulterior promise as preparation for the social responsibilities of adult life; and (_c_) which, _at the same time_, have the maximum of influence in forming habits of acute observation and of consecutive inference. As curiosity is related to the acquisition of material of thought, as suggestion is related to flexibility and force of thought, so the ordering of activities, not themselves primarily intellectual, is related to the forming of intellectual powers of consecutiveness. CHAPTER FOUR SCHOOL CONDITIONS AND THE TRAINING OF THOUGHT § 1. _Introductory: Methods and Conditions_ [Sidenote: Formal discipline]