Abstract
It is important that we consider the relation between understanding and memory, when we make a teaching plan. I have observed a feeble-minded child for a year. This is a report on the results of observations. A feeble-minded child has the same process as pattern in understanding and memory of a popular child. This study is summarized as follows: (1) A child is able to remember one by one not a detail part, but a whole of images. This is, so to speak, pattern recognition and one of the basic memory of a popular child. (2) When a child acquires new knowledge, he could easily learn if he would develop his study on the basis of what he had ever learnt. That is a reason why, we must construct a teaching program in complying with many ways of understanding as children have various experiences.