When a section has been mastered, the children may be encouraged to tell the story in their own way, the monitor taking care that the child is not reiterating the _words_, instead of the _ideas_. A few of the moral circumstances may also be presented to their minds, and the lessons drawn and applied according to their capacity. _Second Classes._--Where the children are capable of reading, they may get a section of the "Groupings," or of any of the "First Steps," to read at home. On this they ought to be catechised in school, before reading it there, to see whether it has been previously read and understood or not. This preparation ought to be strictly enforced. They may then read it by sentences in turn, be catechised upon it, have the moral circumstances separated, and the lessons drawn and applied. One section should in general be _thoroughly known and mastered_, before passing to another; and all the previous sections should be frequently and extensively revised, chiefly by the application of their several lessons. _Higher Classes._--The whole school, with the exception perhaps of the very young classes, may be taken together, and catechised on some section of one of the Steps, or on a passage of Scripture previously prescribed. This they ought each to read and understand _at home_, and be prepared to paraphrase it, to separate the moral circumstances, and to draw the corresponding lessons.[40] This will in a short time be easy for them; and to ensure the preparation, the name of each pupil ought to be kept on a separate card, and these being shuffled, the teacher, after asking the question at the whole, may take the upmost card, and require that child to answer it. All must in that case be prepared, as none can know but he may be the person who shall be called on publicly to answer. The application of the lessons will be found the most useful, and to the children the most interesting part of this exercise. In this the teacher supposes a circumstance, or situation, corresponding to the lesson drawn, in which the pupils may be placed; and he requires them to say how they ought to act in such a case. When they give their _opinion_, they must then give their _authority_; that is, they must refer to the lesson, and through the lesson, to the Scripture truth from which it was drawn. _Natural Philosophy._--In teaching the principles of _Natural Philosophy_, a select class may be formed, more circumscribed as to number, and from among the more advanced scholars. To these, a section, or part of section, of the "First Step to Natural Philosophy," is to be given to prepare at home,--to understand, and to be ready to draw and apply the lessons,--in a manner similar to that prescribed above, and as illustrated in the Key to that work.