Because you can remember it quickly and forget it quickly. Only by reviewing repeatedly can we achieve the effect of long-term memory. In addition, it is difficult to improve the understanding and memory in learning through memory training, while the deep memory of comprehensive ability needs to be obtained through problem solving.
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Memory training can be a personal interest, but you can't think too much about the return. Memory and speed reading definitely add a lot of boasting elements, and now many brain training institutions are making huge profits in this way. However, having a good memory in a certain field doesn't mean that you can improve your learning and working ability quickly. Remember the Rubik's Cube and the key. This ability is difficult to use in real life, and its performance is greater than its practicality.
Originally, learning was a child's business. As a result, parents made themselves nervous, tired and annoyed, and they were unwilling to pay the price. As we all know, only by letting children learn through their own imagination and creativity and discover the fun of learning, instead of rote memorization, can the learning effect be really improved. It should be a happy thing, and any way to force them to study hard is not the best way.