Therefore, in the recitation we should test not alone to see what the pupil knows, but also to see _how he knows it_; not only to find out whether he can recite, but also what are his methods of learning. We should discover not alone whether the facts learned have entered the memory, but whether they have sunk down into the understanding, so that they can be used in the acquisition of further education.
_c. The pupil's points of failure and the cause thereof._--Every teacher has been surprised many times to discover weak places in the pupil's work when everything had seemingly been thoroughly learned. With the best teaching these weak places will occasionally occur. It is not less essential to know these points of failure than to know the foundations of knowledge which the pupil has already mastered. For these weak spots must be remedied as we go along if the later work is to be successful. Very frequently classes are unable to proceed satisfactorily because of lack of thoroughness in the foundation work which precedes. To know where a pupil is failing is the first requisite if we are to help him remedy his weakness.
But not only must the teacher know where the pupil is failing, but also the cause of his failure. Only when we know this can we intelligently apply the remedy for the failure. A physician friend of mine tells me that almost any quack can prescribe successfully for sickness if he has an expert at hand to diagnose the case and tell him what is the matter. This is the hardest part of a physician's work and requires the most skill. So it is with the teacher's work as well. If we are sure that a certain boy is failing in his recitations because he is lazy, it is not so difficult to devise a remedy to fit the case. If we know that another is failing because the work is too advanced for his preparation, we select a different remedy. But in every case we must first know the cause of failure if we hope to prescribe a remedy certain to produce a cure.
Some teachers prescribe for poorly learned lessons much after the patent medicine method. A recent advertisement of one particular nostrum promises the cure of any one of thirty-seven different diseases. Surely with such a remedy as this at hand there will be no need to diagnose a case of sickness to find out what is the trouble. All we need to do is to take the regulation dose. And all patients will be treated just alike whatever their ailment. This is the quack doctor's method as it is the quack teacher's. If the teacher is unskillful or lazy the remedy for poor recitations usually is, "Take the same lesson for to-morrow." There is even no attempt to discover the cause of failure and no thought put on the question of how best to remedy the failure and prevent its recurrence.