L refers to the introduction of calculus (the ultimate goal of official document education) on the basis of K textbook.

K refers to cultivating students' ability to calculate various functions (quadratic function, fractional function, irrational function, exponential function, logarithmic function and trigonometric function).

J refers to cultivating the basic ability of advanced mathematics by studying algebra, factorization, irrational numbers, quadratic equations, equations and higher-order equations, and laying a good foundation for learning K textbooks.

I refers to learning factorization, square root, quadratic equation and quadratic function on the basis of H textbook, so as to lay a good foundation for learning J textbook.

H refers to cultivating students' ability to solve linear equations from one variable to four variables on the basis of algebraic operation ability in G textbook, so as to lay a good foundation for learning I textbook.

G refers to cultivating the operation ability of positive and negative numbers and algebra on the basis of the fractional operation ability of F textbook, so as to lay a good foundation for learning H textbook.

F refers to improving the fractional operation ability of E textbook, cultivating the elementary arithmetic ability of complex fractions, and laying the foundation for learning algebra of G textbook.

E refers to cultivating the ability of calculating four fractions on the basis that the ability of adding, subtracting, multiplying, dividing and dividing and dividing reaches the D textbook, so as to lay a good foundation for learning F textbook.

D means to further improve the ability of multiplication and division on the basis of C textbook, master the division operation of 2 digits, and gradually get used to the concept of "fraction" to lay a good foundation for learning E textbook.

C means to further cultivate students' basic ability of multiplication and division on the basis of addition and subtraction in textbook B, so as to lay a good foundation for learning textbook D.

B refers to cultivating the writing ability of addition and subtraction on the basis of mental arithmetic ability of textbook A, so as to lay a good foundation for learning textbook C.

A refers to further improving students' mental arithmetic ability of addition and subtraction on the basis of the mental arithmetic ability of addition and subtraction cultivated in the textbook 2A, which requires students to reach the level that can be calculated at a glance, thus laying a good foundation for learning the written arithmetic in the textbook B. ..

2A refers to continuing to learn "plus 6" to "plus 10" in the 2A textbook on the basis of the addition ability cultivated in the 3A textbook, and then learning the basic subtraction until it becomes 10, thus cultivating the mental arithmetic ability necessary for learning the A textbook smoothly.

3A refers to letting students learn the addition of 1 to 5 on the basis of the counting and writing ability cultivated in 4A textbook.

4A means that on the basis of the problem-solving ability of 5A textbook, it is required to master the order of 100 from 1 to 100 and be able to write, and at the same time improve the problem-solving ability and perceptual knowledge of numbers, so as to prepare for the addition learning of 3A textbook.

5A refers to cultivating children's pen-holding ability, pen-carrying ability, problem-solving ability and attention by doing problems with pencils. Let children master the numbers within 30 more skillfully through counting exercises and drawing lines with numbers when doing problems.

The way of official documents.

We cherish every child first.

Learning official documents is of great benefit to every child's growth and future. In order to provide as many children as possible with opportunities to learn through official documents, we should keep these two principles in mind when carrying out all activities. This is the only reason for the existence and development of official documents and our responsibility to our children. On the way forward, there may be confusion and differences. At this time, we must ask ourselves, is this really helpful for children? In this way, we once again confirmed the direction of progress. In order to continuously improve the value of documentary education method and let as many children learn documentary education method as possible, we will do our best.