高中英语 Unit 1 Great scientistWarming Up and Reading 教案 新人教版必修5

Unit 1 Great Scientists
Warming Up, Pre-reading and Reading
1．Teaching Aims
①Get Ss to improve their reading abilities.
②Let Ss know the topic “Great scientists”
③Know some important phrases occurring in this reading
2．Teaching Procedures
Step 1 Lead in
Ch eck Ss’ knowledge about some scientists and their discoveries.
①Who discovered that objects in water are lifted up by a force that helps them float?
Archimedes
②Who wrote a book explaining how animals and plants developed as the environment changed?
Charles Darwin
③Who invented the first steam engine?
Thomas Newcomen
④Who used peas to show how physical characteristics are passed form parents to their children?
Gregor Mendel
⑤Who discovered radium?
Maries Curie
⑥Who invented the way of giving electric ity to everybody in large cities?
Thomas Edison
⑦Who was the painter that studied dead bodies to improve his painting of people?
Leonardo da Vinci
⑧Who invented a lamp to keep miner safe underground?
Sir Humphrey Davy
⑨Who invented the earliest instrument to tell people where earthquakes happened?
Zhang Heng
⑩Who put forward a theory about black holes?
Stephen Hawking
After all the questions, then lead in the passage with a picture. Ask ss if they know the map and what it is used for. Give them the answer later “It is a map to find out the cause of Cholera. ”
Step 2 Skim and Scan
More questions are given to get the general ideas of this passage and some obvious facts.
Who defeats “King Cholera“? John Snow
What happened in 1854? Cholera outbreak hit London.
How many people died in 10 days? 500
Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?
These families had not drunk the water from the Broad Street pump.
Step 3 Reading for details
1 Why couldn’t the ch olera be under control at first?
Neither its cause, not its cure was understood.
2 Which theory did John Snow believe in?
People absorbed cholera into their bodies with their meals.
3 John Snow finally proved the theory he believed by ________.
gathering information with the help of a map
looking into the source of the water for Broad Street and Cambridge Street Separating those who suffered cholera from those who didn’t
Both A and B (right choice)
4 To prevent the cholera from spreading again, what did John Snow do? Suggested that the source of all water supplies be examine. Suggested that new methods of dealing with polluted water be found. Instructed the water companie s not to expose people to the polluted water anymore.
Step 4 Mind map of the passage
Paragraph 1: Introduction of John Snow and Ch olera
Paragraph 2: Two theory
Paragraph 3-5: Study of the breakout in 1854
Paragraph 3: Think of a method: Test two theory
Collect the result: Mark the death
Analyze the result: Reason for death and no death
Paragraph 4: Analyze the result: Find the resource of the water
Paragraph 5: Repeat if necessary: Find more evidence.
Draw a conclusion: Cholera was spread by germ
Polluted water carried cholera
Paragraph 6: Prevention of Cholera
Step 5 Retell the passage
Provide ss with a summary with some blanks. Let them retell the passage as well as pay attention to some important words.
Read the passage again and fill in the blanks:
John Snow was a well-known ____ in London in the ___ century. He wanted to find the ______ of cholera in order to ______ it. In 1854 when a cholera ____ out, he b egan to gather information. He _____ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the ______ died. So he decided that the polluted water carried cholera. He suggested that the _____ of all water supply be _______ and new methods of ________ with polluted water be found. Finally, “King Cholera” was defeated.
Step 6 Homework
Read the whole passage and retell.
Go to the net to get more information about UK.。