教案book5 unit 1Great Scientists Period 1

Period 1 2 Warming Up Pre reading Reading Comprehending Teaching 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 Up Purpose 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 work Ask 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 experiment 1 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 question Find a problem Analyze the results Repeat if necessary Suggested Answers Find a problem Make up a question Think of a method Collect results Analyze results Repeat if necessary Make a conclusion 2 Pair work Ask Ss whether they know about infectious diseases and tell the answers to their partners For example flu Bird flu SARS Step 3 Reading 1 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 necessary Soon the disease began to slow down that 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 Snow s 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 experiment Find a problem Make up a question Think of a method Collect results Analyze results Repeat if necessary Make a conclusion Suggested answers ParagraphStages in an experimentExample in this investigation Find 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 Step 3 Post reading Pur