The teaching goal of the lesson plan is 1. Learn to classify the same commodity according to various standards and feel the significance of classification.
2. Cultivate students' practical ability, observation ability and language expression ability.
3. Let students realize that there is mathematics everywhere in life, and mathematics can be applied to life.
Emphasis and difficulty in teaching
Key points: master the method of selecting different classification standards for classification.
Difficulty: Classification will use different standards.
teaching process
First, the introduction of new courses.
Review: Last time we learned to classify according to a standard. Who can talk about "classification"
Introduction: Today, we will continue to learn "classification". (Blackboard Title: Classification)
Second, group activities to explore new knowledge
1. Example 2
Observe the difference between these people. Please classify these people according to the observed differences.
2. Group communication.
Requirements: Tell me how you divide it, and then listen to others.
3. Guide reading.
A. Tell me how the two children in the book are divided.
B. summary: according to different standards, there can be different points.
Third, consolidate exercises and experience according to different standards.
1. subgraph (page 30, question 4)
Requirements: Think about it, how would you divide it? Why do you want to divide it like this?
Represents the grouping results in a table.
2. Split the map. Question 5: 3 1 page. )
Inspiration: Now please observe this group of animals carefully. How many differences can you find? You have found so many different places, can you find a division according to each different point?
3. Summarize the classification methods.
Teacher: Through the activity, we found that every time we find a difference, we can get a corresponding classification method, which is to classify according to different standards. Then please do some exercises with the skills you learned today.
4. mixed exercises. (Question 6, 3 1 page)
Fourth, application exercises.
1. Classify people in the park. (Question 7 on page 32)
Introduction: There is mathematics everywhere in life. Now let's use the skills we have learned to solve some problems in life. This is a scene in the park. Please classify them.
Tell each other a division of labor at the same table and then communicate.
2. Classify the children in your group.
Guidance: Just now, everyone thought of many classification methods, and we also heard the ideas of other students through communication. Now, please use the method you have learned to classify the students in the group. How many points can you get?
A. group activities. (Playing background music)
B. collective feedback exchange.
C. the winning team introduces all the main points.
Verb (abbreviation of verb) abstract
Last class, we learned to classify by one method. Today, we further studied the classification according to different standards. The key to classification is to find different places.
Teaching design
It is not difficult for the first-year students to sort out the knowledge of this unit. Therefore, in teaching, according to the characteristics of the teaching content and the actual situation of the students, I have arranged many activities of independent exploration and cooperation and exchange, so that students can deepen their understanding of classification in the teaching activities of independent exploration, and the key point is to let students learn how to choose different classification standards. Looking back on the whole class, I think the advantage of this class is to cut into mathematics from life and stimulate the desire to learn. Psychological research shows that the closer the learning content is to the students' life background, the higher the students' conscious acceptance of knowledge. It is easy for students to feel that mathematics is around them by importing from their familiar life background. The following is my teaching link:
The first link is an example that happened around you. It is easy to make students feel intimate, stimulate their desire to solve problems, and naturally form the connection between mathematics and life. At the same time, broaden students' thinking, let students talk about the benefits of classification, and fully feel that mathematics knowledge comes from life and returns to life, and should serve life.
The second link is to introduce the theme map of this lesson-balloon map. Q: Can you clearly express the results of classification and counting in your favorite way? Then, students think independently, and then discuss the classification method in groups.
In this activity, students can compare and classify objects according to different standards, or choose a standard; In comparing and classifying activities, experience the consistency of activity results under the same standard and the diversity under different standards. After a simple data sorting process, students can present the classification results in their own way, analyze the data simply and ask simple questions according to the data.
The last link is transferred to the children's real life. Take the students in our class as an example and think about how to classify the students in our class. This problem stems from children's life, and children are very enthusiastic about solving this problem. Everyone spoke enthusiastically and said a lot of classification methods they thought of.
In the teaching practice of this class, although it seems that the classroom atmosphere is very active and students learn easily, they always feel that students are not solid enough.