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精品资料英语必修5人教版新课标Unit 1第1-2课时教案Period 1&2 Warming Up, Pre-reading, Reading& ComprehendingTeaching Goals: 1.To learn about John Snow.2.To develop some basic reading skills.3.To arouse Ss interest in learning about the sprits of scientists.Teaching Procedures:Step 1. Warming UpPurpose: To arouse Ss interest in learning about scientists. To ask Ss to prepare something for the great scientists ahead of time and share them with others.1. Pair workAsk Ss to tell their partners their answers to the following question and show some to the whole class.What do you know about great scientists?2. Group work Ss are divided into 3 groups to do the quiz and try to find out which knows the most.Quiz QuestionsAnswer(1) Which scientist discovered that objects in water are lifted up by a force that helps them float?(2)Who wrote a book explaining how animals and plants developed as the environment changed?(3) Who invented the first steam engine?(4) Who used peas to show how physical characteristics are passed form parents to their children?(5) Who discovered radium?(6) Who invented the way of giving electricity to everybody in large cities?(7) Who was the painter that studied dead bodies to improve his painting of people?(8) Who invented a lamp to keep miners safe underground?(9) Who invented the earliest instrument to tell people where earthquakes happened?(10) Who put forward a theory about black holes?Suggested answers: (1) Archimedes (2) Charles Darwin (3) Thomas Newcomen (4) Gregor Mendel (5) Marie Curie (6) Thomas Edison (7) Leonardo da Vinci (8) Sir Humphry Davy (9) Zhang Heng (10) Stephen Hawking Step 2. Pre-reading Purpose: To get Ss to learn about the stages in a scientific experiment1. Group work(1) Get Ss into groups of four and discuss what kind of experiment they have experienced and the stages of them. Ask some groups to show their views.(2) Ask Ss to put the following stages into proper order.Draw a conclusion Think of a method Collect results Make up a questionFind a problem Analyze the results Repeat if necessarySuggested Answers: Find a problemMake up a questionThink of a methodCollect resultsAnalyze resultsRepeat if necessaryMake a conclusion2. Pair workAsk Ss whether they know about infectious diseases and tell the answers to their partners.For example: flu Bird flu SARS Step 3. Reading1. Skimming Purpose: To get Ss to have a brief understanding of the whole text.The passage is written in order of the stages in an experiment, so ask Ss to scan the text and find the different stages.Suggested answers: Find a problem:John Snow was a well-known doctor in London until its cause was found. Make up a question:He got interested in the two theories and soon the affected person was dead. Think of a method:He believed in the second theory but so severe that more than 500 people had died in 10 days. Collect results:He determined to find out why It seemed the water was to blame. Analyze results:Next, John Snow looked into the source of the water for these two streets that cholera was spread by germs and not in a cloud of gas. Repeat if necessarySoon the disease began to slow downthat polluted water carried the disease. Make a conclusion:To prevent this from happening again, not to expose people to polluted.2. Scanning Purpose: To get Ss to have some details in the text.(1) Read the text quickly and try to get some details from the text. Work in pairs and try to ask and answer questions from the text. Questions can be like these:Q1. Who was John Snow?Q2. What did John Snow do when the serious cholera broke out?Q3. What were the two theories then?Q4. What was John Snows attitude towards the two theories?Q5. How did John Snow find the evidence for his theory?Q6. How did he solve the problem finally?Suggested answers:A1. John Snow was a well-known doctor in London-so famous, indeed, that he attended Queen Victoria to ease the birth of her babies.A2. John Snow wanted to use his knowledge to help solve this problem.A3. The first suggested that cholera multiplied in the air without reason. A cloud of dangerous gas would float around until it found its victims. The second suggested that people absorbed this disease into their bodies with their meals. From the stomach the disease attacked the body quickly and soon the affected person was dead.A4. He believed in the second theory but needed to prove he was correct.A5. He gathered the information and marked a map where all the dead people had lived. And at last he found that all the dead people drank the polluted water from the river.A6. To prevent this from happening again, John Snow suggested that the source of all water supplies be examined and mew methods of dealing with polluted water be found. And finally “King Cholera” was defeated.(2) Since we have got the order of the seven stages, get Ss to write down the evidence or approach John Snow used in each stage. For example:ParagraphStages in an experimentFind a problemMake up a questionThink of a method Collect resultsAnalyze results Repeat if necessary Make a conclusionSuggested answers:ParagraphStages in an experimentExample in this investigationFind a problemWhat causes cholera?Make up a question Which theory is correct?Think of a method Collect data on those who were ill or died and where they got their water.Collect results Plot information on a map to find out where people died or did not die.Analyze resultsAnalyze the water to see if that is the cause of the illness.Repeat if necessaryFind other evidence to confirm your conclusion.Make a conclusionThe water is to blame. The source of all drinking water should be examined so that it is safe.3. Listening.Purpose: To train Ss listening ability.Listen to the tape and follow it in a low voice.4. Language points.Purpose: To train Ss language capacity.(1) attend vt & vi 出席；参加He decided to attend the meeting himself. 照顾；看护Which doctor is attending to (on) you? 伴随The work was attended with much difficulty.（2）absorb vt. 吸收A sponge absorbs water. 使专心The little girl was absorbed in reading a tale.(3) severe adj. 严厉的；严格的I think you are too severe on the boy. 剧烈的He has a severe pain in his leg.(4) announce vt 发表、告知、宣布The government announced its new economic policies. 宣布His servant announced Mr and Mrs White. 显示；预告Warm sunshine announces the coming of spring.Step 4. Post-reading Purpose: To have a deep understanding of the text.Group work Let Ss Talk about the following questions. And present their opinions to the whole class.1. What do you think of John Snow? 2. Do you think him great enough?3. If you were he, what would you do?Step 5. Discussion The text introduces public health medicine to Ss, which is less well-known area of medicine. With the arrival of SARS in China in 2003, we do have some knowledge of the effect of infectious diseases on our life and lifestyle. Discuss with your partners in groups of six and tell us your views.Step 6. HomeworkTry to write a short composition about a familiar scientist.
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