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Lecture notes on "buying stationery" in the first volume of mathematics in the fourth grade of Beijing Normal University Edition
Miaogoumen central primary school
Zhu qiaolian
The theme of my class today is divisor divided by ten. Here is my understanding of this lesson.
And the teaching strategies used in dealing with the teaching content.
(A) analysis of the structure and content of teaching materials
The position of this section in the whole book and unit: the division of divisor is an integer, and ten is a compulsory education course.
Cheng standard test textbook (Beijing Normal University Edition) The first class of division in Unit 5, Grade 4. It is teaching
Materials play an important role in connecting the past and the future. In the second and third grades, students have learned the vertical meter of division in the table.
Calculation, division with remainder, two or three digits divided by one digit, basically mastered the divisor calculation.
Trial business law. Divider is the division of integer decimal. The basic method is the same as the last one, but the difference is quotient.
The value of may be larger. In the trial quotient, it involves the positioning of quotient. The textbook arranges vertical calculation here to
In order to disperse difficulties, understand arithmetic and determine the position of quotient for subsequent study, the divisor is any two digits.
And three numbers to pave the way.
The teaching content of this lesson is divided into two levels: first, teach that the quotient of two digits divided by integer ten is one.
Count. Understand arithmetic and determine the position of quotient. Second, the quotient of three digits divided by integer ten is also a digit.
Inductive calculation.
When solving the first level, the textbook arranges a teaching scene.
solve
80
Yuan Ke
How many schoolbags can I buy? Handle different levels of calculation methods: subtraction, multiplication, pendulum, vertical
For these methods. I understand it this way: the first subtraction actually means division; Diverse
The method is to prepare for the later trial operation; The key point of putting RMB is to help students understand that the divisor is an integer ten.
The arithmetic of division.
(B) the determination of teaching objectives
According to the requirements of mathematics curriculum standards, the positioning of teaching materials, students' psychological characteristics and
The cognitive law determines the teaching objectives of this lesson as follows:
1
, knowledge and skills:
(1) In the process of pendulum, calculation, for example, the principal divisor is the calculation of integer division.
Method. And can calculate correctly.
(2) Cultivate students' ability to summarize and summarize the calculation methods of division in which the inductive divisor is an integer ten,
Cultivate students' logical thinking ability and the ability to communicate with others in mathematical language in declarative reasoning.
2
, process and method:
①
Through observation and operation, let students experience doing mathematics.
(2) in specific situations, guide students to find problems, use what they have learned to solve problems, and
Experience the diversification of problem-solving strategies in the process of inquiry.
three
, emotion and attitude:
2
(1) Through the study of this section of knowledge, the mathematical thinking that "unknown" is transformed into "known" is infiltrated into students.
There is a "connection" between ideas and methods, and between things.
, is "changeable"
、
"Specific issues specific point.
Analysis of dialectical materialism.
By purchasing stationery for Project Hope, students can share the happiness of caring for others.
People enjoy learning.
(C) Difficulties in teaching
Based on the curriculum standards and thorough understanding of the teaching materials, I think this lesson is the last part of this unit.
Learning divisor is the basis of any two-digit number.
Therefore, understanding the method of algorithm mastery is the focus of this lesson.
It is also a difficult point. Another focus of this lesson is "the calculation method of divisor is integer ten"
I am teaching in order to make clear the important and difficult points and enable students to achieve the teaching objectives set in this section.
On law;
(4) Teaching methods
Mathematics is an important subject to cultivate and develop people's thinking. Therefore, in teaching, not only
Let students "know why" and "know why"
. In order to reflect the development of students
I try to do the following.
1
Give students the power to choose for themselves. Respect differences, communicate and interact. If you are begging
discuss
80/20
Why equal to
four
Sometimes the strategies and methods to solve problems are different because of different students.
At the same time, such differences provide resources for mathematics.
I fully respect students' choices.
The exchange of ideas between teachers and students and between students has promoted the participation of mathematics.
Everyone who participates in the activity has something to think about.
2
Leave the opportunity to the students,
Let them experience it for themselves. For example, in understanding arithmetic,
In the teacher's introduction
Under the guidance of the children, pose, say, feel, feel, understand and calculate. Not directly from the teacher.
It is helpful for children to try to sum up their own calculation methods on the basis of telling how to understand calculation.
Cultivate students' ability to solve problems by using existing knowledge and experience, and experience success quickly in mathematics learning.
Music.
three
Give the students a question,
Let them find out for themselves.
The questions given here are not from the teacher.
The students answered the questions, but the teacher skillfully designed a conflict to make the students think positively. As in teaching
When I asked about the necessity of learning vertical posture, I asked: Since everyone thinks oral arithmetic is simple, why do they need to learn written arithmetic?
And then what?
(5) study law
We often say:
"Modern illiteracy is not an illiterate person, but a failure to master learning methods.
People "
Therefore, we should pay special attention to the guidance of learning methods in teaching. First, I will listen and remind students.
Listen to others: Do you understand? Can you repeat that? Secondly, we will cooperate and communicate. If you are begging
discuss
80/20
Why equal to
four
? Guide students to learn various ways of cooperation and communication on the basis of independent thinking.
Complement and reflect on your own methods. Moreover, learn to solve problems by hands-on operation.
Learning style.