Unit 2How often do you exercise Section B (2a-2e)阅读课课件+素材（32张PPT)

Unit 2 How often do you exercise? Lesson 2 Reading Section B (2a-2e) Learning Objectives By the end of the class, we will be able to: 1. analyze the data presented in the text; 2. evaluate the leisure habits of students in No.5 High School students; 3. identify the potential drawbacks of excessive Internet and TV usage; 4. realize the importance of exercise and develop a good exercise habit. The School News magazine gets a lot of data about No.5 High School students’ free time activities through surveys. Can you help think of any ways to present the collected data to make the result and conclusion more visuable? Introduction bar chart pie chart line graph table Here are four common ways to visually present data. Do you know their names? We have learned that the four types of charts can be used in different situations in Math. Try to get some information from these charts. Here is an example. e.g. A line graph can be used to present the changes in temperature throughout a day. 90% 10% The magazine uses pie charts to present the collected data. Look at the following charts and figure out what activities the data is about. Pie charts are useful for illustrating proportions(比例) and percentages(百分比). The magazine also writes a survey report to analyze the results and draw conclusions. Read the report and pay attention to the percentages and frequency phrases in the text. What Do No. 5 High School Students Do in Their Free Time? Last month we asked our students about their free time activities. Our questions were about exercise, use of the Internet and watching TV. Here are the results. We found that only fifteen percent of our students exercise every day. Forty-five percent exercise four to six times a week. Twenty percent exercise only one to three times a week. And twenty percent do not exercise at all! We all know that many students often go online, but we were surprised that ninety percent of them use the Internet every day. The other ten percent use it