Article 1 Teaching objectives:
1, experience the process of data collection, collation, description and analysis, and understand the significance of statistics.
2. Be able to ask and answer simple questions according to the data in the statistical table, and at the same time be able to conduct simple analysis. According to the data in the statistical table, valuable mathematical problems and solutions are put forward.
Teaching focus:
Make students understand the simple statistical process, ask and answer questions according to the data in the statistical table, and make a simple analysis at the same time.
Teaching difficulties:
Through cooperative discussion, guide students to find practical methods to solve statistical problems.
Teaching methods:
The method of combining dialogue and guidance guides students to explore situational problems, and teachers and students interact with each other, so that students can experience the process of finding, asking and solving problems in specific life situations.
Teaching process:
First, situational import
Teacher's guide question: Students, you must wear our school uniform when you enter school. Do you like the color of our school uniform? Name three or five students.
Teacher: Some students like this color, while others don't. If our school wants to customize school uniforms for new students, there are the following four colors. Please be your employee and advise the garment factory which color to choose.
(Name the students to answer and explain the reasons. )
Teacher's guidance: Zhang San likes red, so the school decided to make the school uniform red. How's it going? what do you think?
Second, the new interactive award.
1, discuss the method of collecting data.
(1) Teacher's question: Just now we decided to do a survey in our class. There are quite a few people in our class. How should we investigate? Do you have any good ideas? Name the students to answer. )
Students discuss the methods of collecting data.
(2) display statistics.
What method can be used to complete this statistical table?
(3) Students say different methods. Students may answer: write down their favorite color on paper, raise their hands, conduct a small survey, etc. Everyone reported their favorite color, and we marked it in our form, like drawing "positive"; Please raise your hand to indicate which range you belong to. The teacher counted it and then filled in the results in the table ...)
(4) Teacher's question: Which method do you think is the most convenient?
Teacher: among these methods, raising your hand is the easier one. Now, the teacher gives instructions that everyone can only choose one color. Please raise your hand to show which color you like best.
With the method of "raising hands", teachers and students cooperate to complete the statistical table.
Teacher-student activities, the teacher says colors, the students raise their hands, the teacher counts, and the students fill in the form.
2. What can we learn from this statistical table? Let the students speak freely and tell their findings. )
(1) Teacher: According to statistics, how many people are there in the class? How to calculate? Add up the number of people who like each color, and if it doesn't match the class size, it means that we have made mistakes in the statistical process. )
(2) Teacher: Most people like to explain colors, so this class has a custom-made school uniform, so choose this color. Is it appropriate for the whole school to choose this color for school uniforms? Why?
Organize students to analyze the form, and teachers will guide them according to the analysis, highlighting the significance of statistics.
Third, consolidate and expand.
1. Complete the "Doing" on page 3 of the textbook and investigate where the students in this class like to go for a spring outing.
(1) How will you complete this form?
location
botanical garden
zoo
amusement park
forest park
Riverside palace
number of people
Guide students to find some easy-to-operate methods: raise your hand to register, fill in the form, etc. ) and tell the statistical process; Collect and sort out the data, fill in the form and analyze.
(2) Using a relatively simple method, teachers and students cooperate to complete the "data collection and collation" (emphasizing the accuracy of data), and students independently complete the "form filling".
(3) Group discussion and complete "table analysis".
The number of people who like to go to () is the largest, and the number of people who like to go to () is the least.
The right () person who likes to go to the botanical garden best.
You like going to () best, and some students like going here.
What other questions can you ask? (Students ask questions and the whole class gives feedback. )
2. Complete the first 1 question in the textbook Exercise 1.
Find out which extracurricular group the students in this class like best.
The courseware (1) shows the chart of 1
With the method of "raising hands", teachers and students cooperate to complete the statistical table.
Teacher-student activities, fill in the form together.
(2) Answer the questions according to the table.
The number of people participating in the () group is the largest, and the number of people participating in the () group is the least.
There are () people in our class who have joined the computer group.
I like the () group, and there are () people who like this group.
Fourth, class summary.
Teacher: What did the students get from today's study?
Students speak freely.
Teacher's summary:
The school wants to customize school uniforms for students. There are the following four colors. Which color is suitable?
Red, yellow, blue and white
colour
red
yellow
blue
white
number of people
Teaching content: Example 2 on page 3 of the textbook, and the third and fourth sub-questions of "doing" and 1.
Teaching objectives:
1, the understanding method of statistical data;
2. Be able to answer some simple questions according to statistics;
3. Learn to cooperate with others, accumulate experience in solving problems, and understand the close relationship between mathematics and life.
Teaching emphasis: learn the methods of statistical data and further understand statistical tables.
Teaching difficulty: Can answer some simple questions according to statistics.
Teaching process:
First, introduce new courses.
Teacher: Students, last class we learned the knowledge of collecting data and simple statistical tables in statistics. In this lesson, we will continue to learn the methods of data statistics in statistics. Method for displaying subject statistics
Second, new funding.
Question introduction: The school will hold a story-telling contest. Class Two (1) wants to choose one of the students from Wang Mingming and Chen Xiaofei to take part in the competition. How to choose? Show example 2 on the third page of the textbook. Fill in the statistical results in the table below.
Name: Wang Mingming Chen Xiaofei
vote
(1) According to the statistical results, () should be selected to participate in the competition.
(2) Two students were absent from class and could not vote. What will happen if they also vote?
1, understand the question.
Teacher: What do you know from the reading questions?
Student: The school will hold a story-telling competition. Class Two (1) will choose one student from Wang Mingming and Chen Xiaofei to take part in the competition.
Teacher: To choose who to take part in the competition, we must first determine the election method, and then choose the way to record the results.
2. Election method.
Teacher: We can decide who will take part in the competition by secret ballot. Students who take part in the voting can only choose one of Wang Mingming and Chen Xiaofei to write on paper, and then find a few students to count who has the most votes and who will take part in the story-telling contest.
Student: After the whole class voted by secret ballot, the group leader collected all the notes and waited for the voting data to be counted.
3. The method of counting voting data.
Teacher: Students, the result of your election is in the hands of the group leader. Now, as long as we count who gets the most votes, we will know who can take part in the story-telling contest. Which method do you like to use to count the voting data?
Health: Speak freely.
Teacher: There are many ways to count the voting data. You can draw the word "positive" under the person's name, tick "√" under the person's name, or draw "○" to count ... Let's choose the drawing method of the word "positive" for statistics!
Student: Participate in the process of counting voting data.
4. Organize data.
Teacher: After sorting out the collected data, Wang Mingming got 15 votes and Chen Xiao got 22 votes. how do you know
Health: Each stroke of a "positive" word represents one data, and each "positive" word represents five data. Wang Mingming * * * got three "positive" words, so it was 15, and Chen Xiao got four "positive" words and got two more votes, so it was 22 votes.
Teacher: You are really a thoughtful child.
5. Complete the statistical table.
Teacher: Now let's fill in the above statistical results in this statistical table.
Name: Wang Mingming Chen Xiaofei
Voting 1522
6. Answer the questions according to the statistics.
Teacher: Please answer the following questions according to the statistics.
(1) According to the statistical results, () should be selected to participate in the competition.
According to statistics, Chen Xiaofei has more votes than Wang Mingming, so Chen Xiaofei should be chosen for the competition.
Teacher: You can not only observe, but also compare. You are really capable! Now please solve the second problem.
(2) Two students were absent from class and could not vote. What will happen if they also vote?
Health: If everyone voted for Wang Mingming, then Wang Mingming won 15+2 = 17 (votes), which is still less than Chen Xiaofei, so the final result has not changed, and Chen Xiaofei should be chosen to participate in the competition.
Student: If they all vote for Chen Xiaofei, then Chen Xiaofei will have more votes. In the end, Chen Xiaofei should be chosen to take part in the competition.
Health: If one of them voted for Wang Mingming and one voted for Chen Xiaofei, then Wang Mingming will get 15+ 1= 16 (votes) and Chen Xiao will get 22+ 1=23 (votes). Chen Xiaofei still has more votes, so Chen Xiaofei should be chosen for the election.
Teacher: You really think. Yes, no matter how the two absent students vote, Chen Xiaofei has more votes than Wang Mingming, so he will choose Chen Xiaofei to participate in the competition.
Third, consolidate practice.
Teacher: In fact, many problems in life need to be solved with the knowledge learned in this class. Let's take a look.
1. Complete "Done" on page 3. Investigate where the students in this class like to go for a spring outing.
Students choose their favorite place first, then report it, and draw the word "positive" for statistical data. After sorting out the data, fill in the record results in the statistical table.
2. Complete the third question in exercise 1 on page 4.
Students complete (1) secondary and simple statistics according to the statistics with the word "positive". Then solve items (2) and (3) respectively. As for question (3), whether this month is summer or winter, let the students talk about their own ideas.
3. Complete the fourth question in exercise 1 on page 5.
Students fill in (1) small questions and simple statistical tables according to the method of statistical data. Then solve the second item. For the second question, if you observe 10 minutes, which car may pass the most? Let the students talk about their ideas. Let the students understand that there are 32 cars passing in 10 minutes, which means that cars have generally become people's favorite means of transportation, so if you observe 10 minutes, the cars passing may be the most.
Fourth, summary.
Teacher: Students, what have you gained from your study?
Health: Speak freely.
Teacher: Today we learned the method of statistical data. There are many ways to collect and sort out data, such as drawing "positive", ticking "√" and drawing "○", among which drawing "positive" is convenient and quick. It must be noted that a "positive" word represents five data. At the same time, statistics can help us analyze and solve many practical problems in life.
Fifth, blackboard design.
Statistical data method
The school will hold a story-telling competition.
Wang Mingming Chen Xiaofei Wang Mingming Chen Xiaofei Wang Mingming Chen Xiaofei
Exactly √ √ √ √ √ √ √ √ √ √ √ √.
√√√√√○○○
√√√√√○○○
√√√√√√√○○○○○○○
√√√√○○○○○○○
√√○○
Name: Wang Mingming Chen Xiaofei
Voting 1522
(1) According to the statistical results, (Chen Xiaofei) should be chosen to participate in the competition.
(2) Two students were absent from class and could not vote. What will happen if they also vote?
No matter how the two absent students vote, Chen Xiaofei has more votes than Wang Mingming, so he will choose Chen Xiaofei to participate in the competition.
Sixth, reflection after class.