Unit1 Module 5 Great Scientists
Teaching aims:
1. Learn some new words and expressions .
2. Improve the students’ reading skills.
3. Know how to prove a new idea in scientific research.
Difficult and Important Points:
1）Reading comprehension
2）What did John Snow do to prove a new idea in scientific research?
Teaching Methods:
1. Group work
2. Competition
3. Illustration
4. Deductive Method
Teaching Procedures:
Step I Warming up
Do you know these famous scientists?( Show the Ss some pictures of great scientists and have them say what achievements they have made.)
Step II. Pre-reading
1.Background introduction to John Snow
John Snow (1813-1858) was born and worked as a doctor in Great Britain. He was originally an anesthetist(麻醉师).He was so famous that he became the doctor for Queen Victoria at the births of her many children.
Four outbreaks of cholera in the 1830s and 1840s killed many people in England. In 1854, “the most terrible outbreak of cholera which ever occurred in the kingdom” began. It was so violent and sudden that 127people died in the first three days.
2.Make up a questionName of illness cholera (霍乱)
Symptom(症状) severe vomit (呕吐) and diarrhea (腹泻)
Aftereffect Die quickly from a loss of liquid
What was the cause of this illness ? How did John Snow find it out? (Deductive thinking)
Step III. New words study
Show the Ss a picture of “Water pump”, teach the new words pump& handle and have a brief introduction to it.(e.g. There were some water pumps in different districts in England in the 1850s.. People could use them to pump the water for daily life, but if someone removed the handle from the water pump, it could not be used.
Step IV. Reading
Fast-reading:Read the passage quickly and find the number below and the relevant happenings in the passage.(Competition among groups)
Two theories The first suggested that…multiplied in the air;. The second suggested…absorbed this disease into their bodies with their meals.
In 1854
Another outbreak hit London.
500 , 10
More than 500people had died in 10 days.
16, 37, 38 and 40
These numbers in Broad Street near the water pump had many of the deaths
20 ,21; 8,9
20 and 21 Broad Street and 8 and 9 Cambridge Street had no deaths….They didn’t drink the water from the Broad Street pump.
7
These families worked in the pub at 7 Cambridge Street. They didn’t drink the water from the pump.
Careful reading
Read each paragraph and find out what evidence or approach is John
Snow used in the stage of experiment, then fill in the chart below.
Paragraph Stages in an experiment Example in this investigation
1 Find a problem What causes cholera?
2 Make up a question Which theory is correct?
3 Think of a method Collect data on those who were ill or died and where they got their water.
4 Collect results Plot information on a map to find out where people died or did not die.
5 Analyze results Analyze the water to see if that is the cause of the illness.
6 Repeat if necessary Find other evidence to confirm your conclusion.
7 Make a conclusion The water is to blame. The source of all drinking water should be examined so that it is safe.
Step V. Discussion
1.What’s the significance of Snow’s famous cholera map ?
2.If you were John Snow, how would you investigate the cholera?
Step VI. Summary
Step VII. Homework assignment
1.Finish Ex.1 on P42.
2. Retell the story.
3. Prepare for tomorrow’s dictation.