3. The ultimate objects of the study should always be kept in view, that the end be not forgotten in pursuit of the means.
4. The means ought to be consistent with the end.
5. Example and practice are more efficient than precept and theory.
6. Only one thing should be taught at one time; and an accumulation of difficulties should be avoided, especially in the beginning of the study.
7. Instruction should proceed from the known to the unknown, from the simple to the complex, from concrete to abstract notions, from analysis to synthesis.
8. The mind should be impressed with the idea before it takes cognisance of the sign that represents it.
9. The development of the intellectual powers is more important than the acquisition of knowledge; each should be made auxiliary to the other.
10. All the faculties should be equally exercised, and exercised in a way consistent with the exigencies of active life.
11. The protracted exercise of the faculties is injurious: a change of occupation renews the energy of their action.
12. No exercise should be so difficult as to discourage exertion, nor so easy as to render it unnecessary: attention is secured by making study interesting.