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The research on classification ability is more in kindergartens and more in primary schools. Research by cognitive psychologists has found that children under 0-1 years old basically have no classification ability, and they mainly rely on individual perception. The classification ability of children aged 1-3 has begun to sprout, but the concept of "category" has not yet formed. The classification of children aged 3-5 is basically still based on external perceptible dimensions such as shape and color. For example, children in small classes in kindergartens are asked to classify red plastic balls, red apples and bananas. They will divide the balls and apples together, either according to the shape (circle) or according to the color (red), but they will not put apple kernel bananas together according to the function (edible). What if you add another celery?喜欢我们就订阅我们吧。UDP23分間の恐怖 賀来千香子 反田孝幸海匪再次面面相觑，没人举杯。其实手上水泡挑破上药后，已经结痂了，都快好了。First, you will get points for participating in the middle and senior championships.