"Fan shaped statistical chart" teaching plan courseware
Guide students to understand the characteristics, significance and role of sector statistical chart; Can look at fan-shaped statistical chart, can make fan-shaped statistical chart, can analyze. The following small edition of stgeorgerx.com has sorted out the fan-shaped statistical chart for you Teaching plan Courseware.
1. Through examples, understand the fan-shaped statistical chart, and understand the characteristics and functions of the fan-shaped statistical chart.
2. Be able to read fan-shaped statistical chart, obtain effective information from it, and realize the role of statistics in real life.
Through examples, the fan-shaped statistical chart is known, and its characteristics and functions are understood.
Can read fan-shaped statistical chart, obtain effective information from it, and realize the role of statistics in real life.
1¡¢ Talking into new lessons
Teacher: before class, Mr. Yuan asked us to collect some statistics in our lives. Let's see what the students have collected£¨ Show the students' homework and introduce the statistics they collected.)
What are the characteristics of such a statistical chart?
S: the bar chart can clearly show the quantity. The broken line chart can not only show the quantity, but also the increase and decrease of the quantity.
Teacher: that's right. Now the teacher wants to test whether you can use it. Our school will hold the autumn sports meeting next week. If we draw a statistical chart to clearly reflect the number of students who like various sports, what kind of statistical chart do you think should be drawn?
Student: bar chart.
Teacher: Well, good! The bar chart can clearly reflect the quantity. If I want to draw a statistical chart to show the temperature change in 24 hours today, what kind of chart is suitable?
Student: broken line chart.
Teacher: Well, the teacher also agrees that the broken line chart can not only show the quantity, but also the increase and decrease of the quantity.
The teacher also found that some students have found such pictures. Let's have a look£¨ Ask the students who collect these pictures) can you tell us what you are looking for?
The student answers.
Is this chart also a statistical chart? Today, we will recognize it, a new kind of statistical chart.
Teacher: what knowledge do you want to learn from this topic?
Default: (1) what are the characteristics of sector chart£¨ 2) What is a fan chart?
(3) how to draw a sector chart£¨ 4) What is the use of sector charts?
2. Cooperation and exchange to explore new knowledge
1. Talk about it
Teacher: students are very good at learning. There are so many things you want to know! Let's start with the pagoda chart of balanced diet for Chinese residents£¨ After listening to the introduction of the pagoda chart of balanced diet for Chinese residents, can students know from this map which kind of food we need the most? Secondly? And then?
After reading this picture, do you have any suggestions for the students' diet?
Teacher: Yes, the position and area of each layer in the diet pagoda map reflect the position and proportion of various foods in the diet. This shows that we should pay attention to healthy diet. Next, I'd like to ask the students to have a look at their family's diet.
The courseware shows Xiaoxiaojia's daily intake statistics of various kinds of food
Teacher: please read the statistical table and tell each other the meaning of percentage in the table in the group.
(after the students have finished the exchange, the teacher will call the roll randomly and ask several students to say the meaning of each percentage.)
What is the total intake in the table? What does 100% mean?
Through the explanation of these percentages, does the Xiaoxiaojia's daily intake of all kinds of food conform to the structure of the dietary pagoda chart?
2. Guide the discussion.
Teacher: look, Mr. Yuan redraws a chart according to the data in the statistical table just now. Can you understand it?
Please observe carefully, what do you understand.
According to the teacher's warm tips, think about it and communicate in groups.
(1) how many parts of the circle are divided according to the data? What shape does each part look like? What do the sectors in the graph represent?
(2) in this sector chart, what is represented by the whole circle? What is the sum of all the percentages? Can the corresponding total intake in the above statistical table be 100%?
Teacher: now share the learning results of your group communication with you.
3. Understand the characteristics.
Teacher: students have a thorough analysis of this fan-shaped statistical chart. Think about it. What information can we get from it?
Teacher: can we use a bar chart to show the daily food intake of Xiaoxiaojia? Why£¨ The bar chart can only show the intake of various kinds of food, but not the relationship between the intake of various kinds of food and the total intake. This is also the function that the bar chart does not have, but the fan chart can.)
What are the characteristics of sector charts? The group will discuss it first and then report.
(1) the sector chart can directly show the relationship between the whole and the part£¨ Where is the intuitive expression--- The sector represents the part, and the circle represents the whole) i.e. you can clearly see the percentage of various food intake in the total intake.
Third, consolidate practice and improve feedback