If school success were a reliable index of human capacity, we should be able to go a step further and say that the intelligence test is a general measure of human capacity. But of course no such claim can be made for school success, for that would be to say that the purpose of the schools is to measure capacity. It is impossible to admit this. The child's success with school work cannot be a measure of a child's success in life. On the contrary, his success in life must be a significant measure of the school's success in developing the capacities of the child. If a child fails in school and then fails in life, the school cannot sit back and say: you see how accurately I predicted this. Unless we are to admit that education is essentially impotent, we have to throw back the child's failure at the school, and describe it as a failure not by the child but by the school.