Introduction of the textbook "Digital Coding" for the third grade of primary school mathematics.

People's Education Press

I. Teaching content

This is a theme activity class of "Synthesis and Practice". The purpose is to let students know the application of digital coding thought in solving problems through some examples in daily life, and to explore simple methods of digital coding through observation, comparison and guess, so that students can learn to code with numbers.

Second, the teaching objectives

1. Let students know the meaning of some numbers in a "code" in a specific situation.

2. By observing, comparing and guessing, let students explore simple methods of digital coding.

3. Let students go through the process of designing codes, understand the role of numbers in expressing, communicating and transmitting information in the information and digital age, and learn to code with numbers initially.

Third, the arrangement characteristics

1. Choose materials familiar to students.

There are many examples of using digital coding in life. The textbook selects the most common license plate number, postal code and ID number around students as materials, which is convenient for teachers to start teaching on the basis of children's existing experience.

2. The presentation of materials leaves enough space for students to think and explore.

The question asked by the elf is: "Do you know the meaning of numbers or letters in postal codes and ID numbers?" Then, the two materials are treated differently in detail. Around the interpretation of postal code, the information behind the six numbers is given comprehensively, while the ID number gives the information indicating the date of birth through the dialogue between two students, and the rest is left to the students to investigate and understand. Finally, we arranged activities for students to try coding by themselves. This arrangement undoubtedly leaves time and space for students' independent exploration.

Fourth, specific arrangements.

1. Learn the common digital coding in life and get a preliminary understanding of the coding ideas and methods.

(1) First of all, the textbook presents some common examples of digital coding such as postal code and ID number. The elf asks questions to explore the meaning of numbers and letters in postal codes and ID numbers.

(2) Taking postal code as an example, let students know the structure and significance of postal code and get a preliminary understanding of coding methods.

(3) ID number only through the dialogue between two students, intercepting "date of birth code" and "the penultimate digit indicates gender" as the introduction, guiding students to explore some basic information and coding meaning contained in ID number through observation, comparison and guess.

2. Autonomous coding

(1) Ask the students to give each student a school number. The purpose is to deepen the understanding of the idea of digital coding through this practical activity and the simple method of digital coding.

(2) The elf raised a question for this task: What information should the student number contain? It should be noted that the issue of elves is the core issue that dominates the whole discussion process.

(3) The registration form of this student number is formed by integrating the * * * knowledge reached in the discussion. The textbook only provides an example here, and students can have their own different design schemes.