Unit 1 Science and scientists Period 1 Reading and thinking 教学设计-教案课件-高中英语选择性必修二

Unit 1 Science and Scientists Period 1 Reading and thinking 教学设计 The theme of this section is "understanding the questioning mind". By guiding students to analyze John Snow's process and methods of exploring the source of cholera, cutting off the source of infection, and finally preventing the epidemic of cholera, the textbook urges them to think about and sort out the basic steps and common methods of scientific research, and understand the important role of questioning spirit in scientific research. This paper is a narrative text that describes the development process of events in chronological order. The steps of scientific research are the hidden clue of the article. The first paragraph introduces the background of the research. The second paragraph is the first stage of scientific research, that is, raising the question: there were two views on the source of cholera at that time. The following third paragraph describes the research process adopted by Snow: collecting data, analyzing results, finding further evidence, and finally reaching a conclusion. Snow came up with a scientific and effective way to map cholera cases. He marked the residences of all the patients who died of cholera on the map, so that the residences with high mortality could be seen obviously. Snow found that residents of zero death homes did not have water from a pump because they received free beer. As a result, snow suspected that the pump was the problem. Supported by another case, snow concluded that the water in the pump carried cholera bacteria. He immediately had the pump handle removed, cutting off the transmission of cholera. The fourth paragraph reveals the truth about the spread of cholera. It has been proved that the water in Broad Street is polluted by waste, and people who drink such water will greatly increase the probability of getting sick. The last paragraph describes Snow's contribution to the control of cholera transmission. Thanks to snow's tireless efforts, people began to drink clean water, and the threat of cholera was significantly reduced worldwide. His research results and research methods are also of practical significance to the prevention of cholera today, and "cholera map" has become a classic case of epidemiological research, so snow has won the reputation of "father of epidemiology". 1. Leading students to read about how John Snow defeated “King Cholera” 2. Guiding students to analyze John Snow's scientific process and methods of defeating the epidemic of cholera 3. Instructing stuendents to figure out the basic scientific research steps, and understand the important role of questioning spirit in scientific research. 4. Instructing students to understand the important role of questioning spirit in scientific research. 5. Encouraging students to solve the reading tasks by thinking logically and cooperating with peers. 1.Enable students to work out the stages of scientific research. 2.Cultivate students to form the spirits of raising new questions. Lead in Name some famous scientists you know and share some details about them. The teacher can show some some pictures about some famous scientists with the help of the multimedia. If it is too difficult, the teacher can inspire students by asking some questions. Take Charles Darwin for example, the teacher can show a picture about him and then ask a question:Who wrote a book explaining how animals and plants developed as the environment changed? Pre-reading: Look at the picture, the title and the map, guess what the content of the text is. Then skim it quickly to see if you are right. key: The text is mainly about John Snow and how he defeated king cholera. Step 1: Read the text quickly and find out what order would you put the seven stages in? _____analyze the results _____ask a question _____ draw a conclusion _____ collect data _____ find a problem _____ think of a method _____ find supporting evidence Key: 1. find a problem 2. ask a question 3. think of a method 4. collect data 5. analyze the results 6. find supporting evidence 7. draw a conclusion Step 2: Read the text quickly and find out the answers to the following questions. 1. What’s the purpose of the text? 2. What inspired John Snow according to the first paragraph? 3. What’s the use of John Snow’s map in his research? 4. How did John Snow feel about the cause of cholera after he finished the map? 5. Why was cholera called “King Cholera” in the text? keys: 1. To tell us how John Snow found the cause of cholera and the cure for it. 2. To destroy Cholera once and for all. 3. To help him find the reason of the cholera outbreak by marking the residences of all the patients. 4. Unsure; he suspected that the water pump was to blame. Thus, he needed more supporting proof. 5. Because cholera was the most deadly disease of its day. Step 3： Read the passage again and complete the chart below. At was believed that cholera was caused