1、教学设计ReadingTeaching goals:Knowledge aims:1Get students to learn the useful words and expressions in this part:astronomy,system ,religion , theory,atom ,billion ,globe,violent,carbon ,atmosphere, unlike,fundamental,harmful ,acid ,chain,multiply,oxygen,exist,thus,dioxide,puzzle ,solar system,in time,l
2、ay eggs,give birth to,in ones turn,carbon dioxide, preventfrom2Let students learn about the development of the earth and life.Skill aims:1Improve students reading comprehension ability.2Enable students to know about how the earth came into being and the development of life.Moral culture aims:1Train
3、students interest in science and stimulate their love for astronomy.2Have a deep understanding of the importance of protecting the environment.Teaching important and difficult points:1Discuss the development of life.2What will our future be like if the earth becomes too hot to live?And what can we d
4、o to prevent such serious situation from happening?Teaching methods & strategies:1Taskbased method & skimming and scanning.2Askingandanswering activity to check students understanding of the text.3Observation strategy & cooperation strategy for discussion.4Strategies of finding information by readin
5、g.5Individual,pair or group work to finish each task.Teaching aids:A recorder MultimediaTeaching procedures:tep 1 Leadin(individual work)T:As we all know,the earth has been existing for billions of years.Did_human_beings_live_on_the_earth_when_the_earth_came_into_being?If not,where do human beings c
6、ome from?Or who were our ancestors?S1:Monkeys!S2:Beijing Ren who lived many years ago.S3:Apes(类人猿) S4:Gorillas(大猩猩) S5:Chimpanzees (黑猩猩) T:Very good.They belong to primate(灵长目动物) Another question:Do you know what plays the most important part in our body?(Water or fat?)T:Water.Then do you know how d
7、id water come into being on the earth?Ss: No.Step 2 Fast reading(task 1)Read Paragraphs 13.After reading,let students watch the video of “Big Bang”,and then answer the question “How did water come into being on the earth?” (individual work )Possible answer:The explosion of the earth produced water v
8、apour,which turned into water when the earth cooled down.Read the first three paragraphs again with the questions on the screen:1)What is the earths atmosphere made up of?2)Why was the earth different from other planets?AIt produced a lot of heat. BThe water remained.CWater disappeared. DIt was the
9、oldest planet.3)Why was water very important for the beginning of life?When students meet some difficulty,the teacher can give them some hints.For example:What is the earths atmosphere made up of?(Show students some pictures about the earths atmosphere.)Do the exercises.(group work)Check the answers
10、.Possible answers:1)Carbon,nitrogen,water vapour and other gases.2)B3)Water allowed the earth to dissolve harmful gases and acids into the oceans and seas.That made it possible for life to begin to develop.Step 3 Intensive reading(task 2)T:When water came into being on the earth,life began.Then do y
11、ou know how the life developed?Read the whole text and finish the chart.(pair work)Development of LifeAsk two students to write their answers on the blackboard.Possible answers:1dust 2globe 3atmosphere 4Water 5plants 6oxygen 7land 8amphibians 9dinosaurs 10mammalsStep 4 Have a discussion(task 3)Throu
12、gh the writers description,we learned the development of life.Its a long and slow process.And the earth is the best place for all the living things to live on.But human beings didnt take good care of it.Listen to the last paragraph twice with books closed.Choose the best answers.(individual work )1)
13、What problem is caused by human beings?AThey exist everywhere on the earth.BThey cause global warming.CThey find new methods of growing crops.DThey enjoy hunting and fishing.2)From the last paragraph we can infer that the author is a little _.Ahappy B careless Cworried D excitedPossible answers:1)B
14、2)CNow we learn that human beings cause global warming.That is the green house effect.If the earth may become too hot for the lives on it,what will our future be like?And what can we do to protect our earth?Please have a discussion according to the questions.(group work)Questions:1)What will our fut
15、ure be like if the earth becomes too hot to live?2)What can we do to protect our earth?Notes:The green house effect is the main cause of the melt of iceberg,drought,floods and insect pest.Everyone on the earth must take action to protect our earth.For example,we can plant many trees.We must do our b
16、est to stop polluting our environment.Many new laws should be passed to place strict control over industrial pollution.Educate people in fighting pollution.Ask some groups to present their opinions.Step 5 SelfassessmentWrite down your opinions according to the questions in the card.1)Can you give a
17、brief introduction to how the universe developed,how life began on the earth and the development of life in your own words?2)What strategies of reading have you learned in the class?3)Are you active in the class?4)What problems did you have in reading?5)What help do you need from the teacher?Step 6 Homework 1)Please try your best to retell the passage in your own words.2)Write a short passage according to what we have discussed.The title is “How to Protect the Earth”About 120 words.