人教版选择性必修二Unit1Science and Scientists
Reading and Thinking教案
Teaching goals
1.Through the overall reading activities, we can get John Snow's research process on cholera, sort out the basic steps of scientific research, and summarize the importance and contribution of John Snow's research on cholera.
2.Through reading activities such as searching and close reading, we can extract the key information or topic sentences of the text, summarize the main idea of each paragraph, analyze the structure of the article, grasp the development of the text, improve the ability of text analysis and generalization, and deeply understand the deep meaning that the author wants to convey.
3.Understand the information in the chart, read the meaning of symbols and illustrations, and interpret them in depth with the text.
4.Judge the genre of the article, organize the information logically with the help of flow chart and "cholera map", analyze, demonstrate and infer the causes of cholera transmission, retell the process of scientific research, express personal views, develop logical thinking and learn to think critically.
5.This paper analyzes John Snow's qualities as a scientist, understands the role of questioning spirit in scientific research, and deeply interprets scientific research.
Key and difficult points of teaching
Key points of teaching
1.Obtain the main idea and details of the text, understand the relevant information of cholera and John Snow, and master the main content of the text.
2.By using different reading skills such as skimming, searching and close reading, we can grasp the development of the text, improve the ability of text analysis and generalization, and deeply understand the deep meaning that the author wants to convey.
3.With the help of flow chart and "cholera map", the causes of cholera transmission were analyzed, demonstrated and inferred, and the process of scientific research was retold.
difficult points of teaching
1.Read and understand the text as a whole, judge the genre of the article, understand the information in the chart, understand the meaning of symbols and illustrations, and think and interpret deeply in combination with the text.
2.Understand the basic steps of scientific research, analyze John Snow's scientist quality, understand the role of questioning spirit in scientific research, and interpret scientific research in depth.
Teaching steps
Step 1
Ask students to discuss the following questions.
What infectious diseases do you know of
Can you name some famous scientists you know and share the achievements about
them
Suggested answers:
天花,西班牙流感黑死病,肺结核,霍乱,艾滋病,黄热病,非典,埃博拉病毒
Tu Youyou. She was awarded the Nobel Prize because she discovered the artemisinin to cure malaria.
Yuan Longping. He was called the “father of hybrid rice".
Thomas Edison.He invented electric bulbs. He made more than 1,000 inventions during his life.
2. Ask students to enjoy a video “The Story of Cholera”.
3. Ask students to look at the title, the picture and the map of the passage. Have them guess what the passage is about. Then ask them to skim the passage to see if they are right.
Step 2
1. Read for the main idea of each paragraph.
Ask students to read the passage quickly and match the main ideas with the paragraphs.
Para. 1 A. John Snow decided to prove the second theory.
Para. 2 B. John Snow's contributions,
Para. 3 C. John Snow desired to destroy cholera.
Para. 4 D. John Snow began his study by marking on a map the exact places.
Para.5 E. The truth of the infection of cholera.
Suggested answers:
Para, 1-C Para.2-A Para.3-D Para. 4-E Para.5-B
2. Read for detailed information.
(1)Ask students to try to put the stages of scientific research in order.
Suggested answer:
5-2-7-4-1-6-3
(2)Ask students to skim the passage to see if the order they decided in Activity 1 is correct.
(3)Ask students to scan the map and answer the following question.
·What kind of map is it
Suggested answer:
·It's Snow's cholera map.
(4)Ask students to read the passage again and complete the chart.
Suggested answers:
A: air,food or water; B: marked on a map, died; C: water pump, hadn't, drinking water from the pump; D: cholera germs; E: handle
Step 3
Ask students to complete the summary.
In the early 19th century, an outbreak of cholera hit Europe,① (cause) millions of deaths. Seeing this, John Snow became frustrated because no one knew how ② ( prevent) or treat cholera. At that time, doctors had two theories to explain how cholera spread. One was that bad air caused the disease and the other was that cholera was caused by germs in food or water. John discovered that in two particular streets ③ cholera outbreak was④ severe that over 500 people died in ten days. Through his serious⑤ (investigate), he found it was the pump water in Broad Street⑥ resulted in the disease. Therefore, he had the handle of the pump⑦ (remove). It turned out that the water from the pump⑧ (infect) by waste.Through Snow's
tireless efforts, water companies began to sell clean water, and the threat of cholera around the world saw a substantial decrease. Snow transformed the way scientists study diseases. For this reason, he is considered the father of modern epidemiology.
Suggested answers:
①causing ②to prevent③the④so⑤investigation⑥that⑦removed⑧had been infected
Ask students to match the headers with the letters from the chart in Activity 3.Have write A~E in the blanks.
Suggested answers:
①D ②C ③B ④E ⑤A
Step 4
Ask students to read the passage again and answer the questions.
Did it make sense for John Snow to believe in the second theory
Why Why did John Snow mark information on a map
When John Snow found a sharp contrast in the death tolls between two neighbouring streets, what did this evidence lead him to conclude
What was the most important tool Snow used to defeat cholera What common medical tools,e.g., a microscope, didn't he use Why
How has John Snow's work affected our daily lives
Suggested answers:
Yes, it did. Because as long as he based his research on the right theory, it was easier for him to find the cause of the cholera.
Because it could help him find the exact deaths in different neighbourhoods.
This evidence led him to conclude that the water pump was to blame.
He used maps and statistics to analyse where the deaths occurred.
He didn't use a microscope, for example. He didn't test the water, nor did he draw blood or examine patients.
The reason he did not use medical equipment such as a microscope was because, while they may be good at identifying what the germ is, locating where the germ comes from and how it spreads is not possible with the microscope. Further, understanding of germ was still developing, and so he had to innovate methods himself based on the theory he believed.
Snow's work has provided readily available clean water to drink, for example, as well as an emphasis on hygiene such as the need to wash hands after they become dirty. He also showed how to prevent cholera epidemics,and transformed the way scientists study diseases, which has allowed for more protection from once common diseases such as cholera.
Homework
Write down the words and expressions of the passage.
Read and recite the text.
Write a short passage of the text