北师大版高二选修七教案：Unit 20 period 5.docx

the fifth period reading (ii)teaching goals 教学目标1. target language目标语言a. 重点短语range from to, single out, according to, be used to, wrestle with something, be dedicated to, by mistake b. 重点句子 in the summer of 1905, this outspoken young man was rocking his one-year-old baby when he was suddenly inspired.without the discoveries of these pioneers in science and technology, whether lucky or planned, the world as we know it today would have been a completely different place.2. ability goals 能力目标enable the students to talk about some pioneers of science and some discoveries and inventions.3. learning ability goals 学能目标help the students learn how to talk about some pioneers of science and the importance of some discoveries and inventions.teaching important and difficult points教学重难点talk about some scientists and their discoveries.teaching methods教学方法scanning, skimming and discussing. teaching aids教具准备a recorder, a computer and a projector.teaching procedures and ways教学过程与方式step i revision and lead-in check the answers to exercises 1, 3, 4, 5 and 6 on pages 76 and 77. meanwhile, explain word-formation: affix and prefix as well as abbreviations where necessary. t: in the nineteenth and twentieth centuries, scientists all over the world made many important discoveries in many fields. can you name some of them? what are their discoveries?s1: madame curie studied physics and discovered radioactivity.s2: albert einstein was famous for his theory of relativity.s3: alexander fleming. we should thank him for his discovery of penicillin. t: wonderful. there were some other scientists who also made great contributions to the world. today lets read a passage “pioneers of science”.step ii reading (pages 24 & 25)ask the students to read the passage on pages 24 & 25 and learn about some important discoveries.t: now turn to page 24 and look at the pictures on pages 24 & 25. do you know the major discoveries of the scientists in the pictures? any volunteer?s: albert einstein: the theory of relativity; edwin hubble, who discovered nebulae; alexander fleming, penicillin; the last picture is about one of the scientists who produced the worlds first computer. t: good. now do exercise 2 and try to match the discoveries with how they were discovered. ask one of the students to read his answers to this exercise.skimming t: up to now you have guessed something about the scientists without reading the passage. please read the passage to check your guesses you made just now. and try to answer the following questions.1 how many important discoveries and pioneers are mentioned in the passage?2 were all their discoveries made by accident?after the students reading, ask two of them to answer the questions.t: whod like to answer the first question?s: five.t: what about the second one?s: not all their discoveries were made by accident. some of them are made by chance, while some as planned.scanning t: ok. youve got the general idea of the passages. now ill give you a few minutes to read the passage again carefully and get more information about it. do exercise 4 on page 25 and try to decide the statements are true or false. you can first refer to the reading strategies on page 24 before doing the exercise. are you clear?s: yes. t: ok. please begin.after a few minutes, check the answers together.t: time is up. ill ask some of you to read the answers for us.suggested answers to exercise 4:1 f 2 ni 3 f 4 ni 5 f 6 t 7 f 8 ni 9 t 10 t 11 t 12 texplanationt: up to now, you have understood the passage well. listen to the passage, paying attention to the phrases and important sentences on the screen. show them on the screen.range from to, single out, according to, be used to, wrestle with something, be dedicated to, by mistake 1 in the summer of 1905, this outspoken young man was rocking his one-year-old baby when he was suddenly inspired.2 without the discoveries of these pioneers in science and technology, whether lucky or planned, the world as we know it today would have been a completely different place.t: do you have any difficulty in understanding the passage?s: could you explain how to use the two phrases “be used to” and “be dedicated to”?t: a good question. first you should pay attention to the usage of the word “use” in the following three sentences. they have different meanings. 1) wood can be used to make paper. 2) i used to play basketball, but i dont now. 3) i have been used to getting up early. second, a noun or a verb-ing form should be used after the phrase “be dedicated to”. here “to” is a preposition. are you clear?s: yes. thank you.t: do you have any other questions to ask?s: no.t: now lets do exercise 1 on page 70 and study some scientific words.ask one of them to read his or her answers to this exercise.discussion ask the students to discuss the questions of exercise 6. they are given several minutes to discuss. each member is encouraged to think actively and participate in the discussion. make sure all the students have their own opinion.t: discuss these questions of exercise 6 with your partner. after a few minutes, ill ask some of you to report the result of your discussion.suggested answers to exercise 6:1 i think the worlds first computer has been the most important so far. although it was nothing like our computers today, it has a great effect on modern computers. it is computers that have nearly changed our world. a computer is playing a very important part in our life. through it we can learn some modern information about society, the country, and the world. we can also play computer games, write an e-mail, entertain ourselves, exchange ideas and so on with a computer. in a word, a computer is becoming increasingly popular. it is a necessity in our life.2 in my opinion, edwin hubbles discovery will have the most important consequences in the future, because he began to explore our galaxy and was about to make astronomys greatest breakthrough. it was his discovery that made us understand the universe better. and space is our final frontier. well continue to explore space. 3 i admire percy spencer the most. it is his discovery microwave that allows us to prepare meals in minutes. it brings much convenience to people, especially to the women who have got work and been rushed off their feet. the working women are lighted by the microwave oven. this can save a lot of time so that they can do something else. 4 i think einsteins discovery is the most difficult to understand. i dont know how to understand “e= mc2” and “theory of relativity”well. they are both scientific terms in physics, which are hard to understand for ordinary people. step iii reading (page 72)get the students to read the passage on page 72 and finish off the exercises about it.t: just now we talked about some important discoveries in the twentieth century. the importance of them to social progress is very great. apart from the discoveries, there were many inventions that also changed the world, even simple inventions. now well read another passage on page 70 “simple inventions that changed the world”. the inventions are closely connected to our daily life. read the passage quickly to find the answers to the following questions on the screen.show them on the screen:1 how many inventions are mentioned in the passage?2 what are they?after the students read it, check the answers together (1 three. 2 the clock, the refrigerator and the elevator.) t: i think you have a general idea of the passage. this time read it carefully and try to finish exercise 2 on page 73 to get some detailed information about it. after 5 minutes, check the answers together.t: good! now lets do exercise 2 on page 70 and study some words. ill give you two minutes.after 2 minutes, ask 10 students to report their answers one by one. explain the difficulty where necessary.step iv summary and homeworkhelp the students to understand the importance of discoveries an