1、教学设计Revision：Summing Up and Learning Tip整体设计教材分析This is the last teaching period of this unit，so the emphasis should be placed on going over and summarizing what has been learned in this unit.It includes the following parts：Summing Up，Learning Tip ，assessment and consolidation exercises.Summing Up s
2、ummarizes the whole contents of this unit from the aspects of topics， vocabulary and grammar.The teacher can first use this part to let students sum up what they have learned and then explain what students couldnt understand very well in this unit.An experienced teacher should design some additional
3、 exercises for students to do in order that they can learn to use and grasp all the contents.Learning Tip tells students that astronomy is a scientific subject made up of mathematics and physics.Encourage them to use the scientific method when studying English.They can study carefully how new words
4、and structures are used，try to make a simple rule in their own words to explain how and when a new word or structure is used，test their theory by using the words or structures in new situations and ask people to tell them if they are using them correctly.Then they will know if their theory is correc
5、t.This is a good way of learning English.So make sure that students have a try.In this period，the teacher can also provide more practices to consolidate what students have learned in this unit.Finally，ask students to finish Checking Yourself on Page 68 in the Workbook.This part aims at encouraging s
6、tudents to make a selfassessment after they finish learning this unit.It is very important to improve their learning.Of course，a testing assessment is also needed.教学重点1Get students to review and consolidate what they have learned in this unit.2Develop students ability to solve problems.教学难点Get stude
7、nts to turn what they have learned into their abilities.三维目标知识目标1Get students to go over the useful new words and expressions in this unit.2Have students review the new grammar item：noun clauses as the subject.能力目标1Develop students ability to use the important language points in this unit.2Enable st
8、udents to learn to use noun clauses as the subject correctly.情感目标1Encourage students to learn more about astronomy.2Stimulate students love of science.3Strengthen students sense of group cooperation.教学过程Step 1 Revision 1Check the homework exercises.2Dictate some useful new words and expressions in t
9、his unit.Step 2 LeadinTell students：Up to now，we have finished Unit 4 Astronomy：the science of the stars.Have you learned and grasped all in this unit？Turn to Page 32.You can check yourself by filling in the blanks in the part Summing Up.Step 3 Summing UpFive minutes for students to summarize what t
10、hey have learned in this unit by themselves.Then check and explain something where necessary.Suggested answers：Write down what you have learned about the development of the earth and making a space trip.（Students_answer _may_vary.）We_have_learned_about_science_of_the_stars，the_development_of_life_an
11、d _space_travel_and_gravity.From this unit you have also learneduseful verbs：multiply，exist，puzzle，crash ，pull，floatuseful nouns： astronomy，system， religion，theory ，atom ，billion ，globe，carbon，atmosphere，acid，chain，oxygen，dioxide ，puzzle ，biology，biologist，gravity，satellite，physicist，climate，spacesh
12、ip，float ，massuseful adjectives and adverbs：billion ，violent，fundamental，harmful，gentle，thusother expressions: solar_system，in_time，in_ones_turn ，carbon_dioxide，now_that a new grammar item：noun_clauses_as _the_subjectStep 4 PracticeShow the exercises on the screen or give out exercise papers.First l
13、et students do the exercises.Then the answers are given.The teacher can give them explanations where necessary.Word spelling1The old administration s_ is under greater and greater challenge.2Almost every country has some form of r_.3One t_ about the moon is that it is a piece broken off the earth.4N
14、ot a few v_ scenes were cut from the film before it came to show.5The earth has an a_ which allows us to breathe the air.6She is u_ her mother；she is tall and her mother is very short.7Fresh air is f _ to good health.8When animals have more food，they generally m _ faster.9The Roman Empire e_ for sev
15、eral centuries.10Its a p_ where all my money goes each week.Fill in the blanks with the expressions given below.Use each expression only once and make changes where necessary.in time give birth to in ones turn preventfrom cheer up now that break out watch out1Over 500 people were working in the buil
16、ding when a big fire _ on the third floor.2A few pictures _ this room _ a bit.3I intended to catch the early train，but I didnt get up _.4What can we do to _ the disease _ spreading?5_ you are grownup ，you should not rely on your parents any more.6The staff were asked to _ for forged banknotes.7Mary
17、_ a healthy baby last night，which makes her family very happy.8They ，_ ，entered the hall and seated themselves at the back.Fill in the blanks with proper conjunctives.1_ Alice should have married Tom is not at all surprising.2_ caused the fire is still a mystery.3_ she comes or not doesnt concern me
18、.4_ the book will sell depends on the author.5_ he left so suddenly is not known to us all.Keys for reference：1system 2religion 3theory 4violent 5atmosphere 6unlike 7fundamental 8multiply 9existed 10puzzle1broke out 2cheered；up 3in time 4prevent ；from 5Now that 6watch out 7gave birth to 8in their tu
19、rn1That 2What 3Whether 4How 5WhyStep 5 Learning TipAsk students to turn to Page 32.Read through the passage and make sure they understand it.Encourage them to do as the passage tells them to because if they are doing so they will be teaching themselves a useful way of learning and form a good habit.
20、Step 6 Assessment1Checking Yourself（on Page 68 in the Workbook）First get students to think about these questions individually.Then they can discuss in groups sharing their experience.The teacher can join in and give them advice and suggestions where necessary.2Fill in the form.After learning this un
21、it，Im able to do the following thingsVery well Well Only with the help of others I need to work harder.1Giving a brief introduction to the beginning of the earth in my own words.2 Describing how the gravity will change if I leave for the moon for a spaceship.3Giving a brief introduction to the “blac
22、k hole” theory.4Using the new words and expressions of this unit in speaking and writing.5Using the expressions of giving instructions in speaking.6Using the noun clauses as the subject correctly in speaking and writing.Step 7 Homework1Finish off the Workbook exercises.2Review and summarize what you
23、 have learned in Unit 4.备课资料Further readingThe Mystery of When Life BeganScientists are still trying to unravel one of the greatest mysteries of earth：When did “life” first appear and how did it happen？It is estimated that the first life forms on the earth were primitive，onecelled creatures that app
24、eared about 3 billion years ago.Thats pretty much all there was for about the next two billion years.Then an unprecedented profusion of life in incredibly complex forms began to fill the oceans.Some crawled from the seas and took residence on land，perhaps to escape predators in the ocean.A cascading
25、 chain of new and increasingly differentiated forms of life appeared all over the planet，only to be virtually annihilated by an unexplained mass extinction.It would be the first of several mass extinctions in Earths history.Scientists have been looking increasingly to space to explain these mass ext
26、inctions that have been happening almost like clockwork since the beginning of “living” time.Perhaps weve been getting periodically belted by more space rocks（i.e.asteroids） ，or the collision of neutron stars happening too close for comfort？Each time a mass extinction occurred，life found a way to come back from the brink.Life has tenaciously clung to this small blue planet for the last three billion years.Scientists are finding new cues as to how life first began on the earth in some really interesting placethe deep ocean.
