高中英语人教版 (2019)选择性必修 第三册Unit 1 Art教案

Unit 1 Science and Scientists

Reading and Thinking---John Snow Defeats “King Cholera”

Teaching objectives:

1.    Enable students to recall and name the deadly diseases that they heard of.
2.    Enable students to figure out the structure of the passage by analyzing the main idea of each paragraph.
3.    Identify the stages of scientific research and figure out the stages in the text.
4.    Find out the contributions that John Snow made and learn his qualities.

Teaching emphases:

1.    Lead students to learn the process of doing scientific research.
2.    Help students analyze the discourse structure and research stages.
3.    Discuss John Snow’s contributions and inspire students to learn from him.

Teaching difficulties:

1.    Instruct students to figure out the discourse structure and research stages.
2.    Lead students to express their opinions on the characteristics of John Snow.

    Teaching procedures:

Step I Lead-in

Watch and think.

1. Are you familiar with these situations/scenes?

Suggested answers:

1. run nucleic acid tests

2. get vaccinated

We are taking measures to fight against coronavirus!

Step II Pre-reading

1. Besides coronavirus, what other kinds of epidemics have you heard of?

bird-flu（禽流感）    malaria（疟疾）

plague（鼠疫）       Ebola(埃博拉)

CHOLREA

2. How much do you know about it? What are the symptoms of Cholera？

It begins in the stomach and a severe case can lead to death without immediate treatment.

3. A short story about cholera

Many years ago, the cholera in the world killed millions of people. People were afraid of it, but they didn't know what to do. Luckily, a young doctor decided to find out how to prevent and treat the disease. Finally, the doctor won the battle.

Who is he?   John Snow

Let’s get to know more about John Snow

Question: What will be talked about from the title?

John Snow  Defeats“King Cholera”

Who?     How?       What?

4. Figure out the correct stages in scientific research

Suggested answers:

find a problem →ask a question→ think of a method →collect data →analyze the results →find supporting evidence →draw a conclusion

Step III While-reading

1. Scan the passage and write down the key words of each paragraph.

Paragraph 1: John Snow desired to destroy cholera

Paragraph 2: John Snow decided to prove the second theory

Paragraph 3: Snow began his study by marking on the map

Paragraph 4: Truth of the infection of cholera

Paragraph 5: Snow's contributions

2. Read Paragraph 1 and answer the questions.

Cholera

It's one of ___________________ in the world, because it causes _________________________________.

_____________________ (when), an outbreak of cholera hit ________ (where) millions of people ____________________(how).

John Snow

John Snow became ___________ because no one knew ___________________.

He rose to become _____________, and even __________ Queen Victoria when she gave birth.

However, he had a desire to ______________ once and for all.

3. Read paragraph 2   Find a problem & Ask a question

(1) Two contradictory theories

(2) Snow subscribed to the second theory.

(3) What did John Snow investigate/discover when another outbreak hit London in 1854?

4. Read paragraph 3   Think of a method & Collect data &Analyze the results

Think of a method: mark on the map where those who died had lived.

Collect data: the street of multiple deaths & no deaths.

Analyze the result: He suspected that the water from the pump was to blame.

Find supporting evidence & Draw a conclusion

Find supporting evidence: Two deaths

Draw a conclusion: Pump water carried the cholera germs.

Solution: Remove the handle of the pump

Read from Para. 2-3 again and complete the chart below.

Some people __________ drunk the water from the pump, and lived.

Para. 4-5   truth and contributions

1. What caused the outbreak of cholera in London in 1854?

Water companies sold water from the River Thames that was polluted by raw waste, causing people who drank this water to get malaria.

2. What contributions did John Snow make?

1. Water companies began to sell clean water.
2. The threat of cholera around the world decreased.
3. He helped people know how to prevent cholera.
4. Snow transformed the way scientists study diseases.

Step IV　Post-reading

In the early 19th century, an outbreak of cholera hit Europe, _______ (cause) millions of deaths. Seeing this, John Snow became frustrated because no one knew how _________ (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 another was that cholera was caused by germs in food or water. John discovered that in two particular street _____ cholera outbreak was ____ severe that over 500 people died in ten days. Through his serious ____________ (investigate), he found it was the pump water in Broad Street _______ resulted in the disease. Therefore, he had the handle of the pump  ________ (remove) .

It turned out that the water from the pump _______________ (infect) by waste. Through Snow's tireless efforts, water companies began to sell clean water, and the threat of cholera around the world saw ____ substantial decrease. Snow transformed the way ________________ scientists study diseases. For this reason, he is considered the father of modern epidemiology.

Evaluation of John Snow

    As a scientist, he found out _________________________.

    As a doctor, he helped us to ____________________.

Suggested answers: what caused cholera    prevent cholera

What qualities do you think John Snow has?