Learning to classify is to classify some things in daily life according to some similarity, such as color, shape, use and so on. Parents should pay attention to guiding their children to find the basis of classification, that is, the similarities of things. Let children pay attention to the details of things and enhance their observation ability. To know large groups and small groups, we should first teach children the names of some related groups, such as furniture and animal food. Let children understand that each group has certain ingredients. At the same time, let children understand that large groups contain many small groups, and small groups are combined into large groups. Such as animals-birds-sparrows. Understanding the concept of order is helpful to children's future reading and an important way to train children's logical thinking. These orders can be from largest to smallest, from hardest to softest, from sweet to light, and so on. , and vice versa. Establish a concept of time. Children's concept of time is very vague. It is undoubtedly necessary for children to master some words expressing time and understand their meanings. When children really understand the meaning of words such as "before", "immediately" or "immediately", they may be more disciplined. Understand the basic concepts of numbers. Many preschool children, some even two or three years old, can go from 1 "number" to 10 or even more. It is not so much a "number" as a "back". Parents should be more patient when children count. Let the children touch things while talking, and gradually transition to "silently counting" with their eyes. In daily life, parents should try their best to say concepts that can be accurately expressed by numbers. At the same time, we should also pay attention to the use of "first", "second" and "third" ordinal numbers. You can also use the relationship between numbers in daily life to help children master some concepts of increase and decrease. Adults who master some spatial concepts often think that children are born with spatial concepts such as "up, down, left, right, inside and outside", but this is not the case. Parents can take advantage of various opportunities in daily life to guide their children, such as "Please put the spoon in the bowl". It is more difficult for children to master the concept of "left and right"