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111 The Second Period  The General Idea of This Period In this period,　we’re going to read a passage on the reaction of metals. Teaching Aims 1.　Improve the students’ ability of reading comprehension. 2.　Get the students to have a global understanding of the reading passage. 3.　Train the students to guess the meaning of a word according to the context. Teaching Important Points 1.　Train the students’ reading ability. 2.　Get the Ss to understand the reading text. Teaching Difficult Point How to improve the students’ reading ability. Teaching Methods 1.　Individual,　pair work to make every student work in class. 2.　Fast reading and careful reading to understand the passage correctly. Teaching Aids 1.　a tape recorder  2.　a projector 3.　a multimedia computer  Teaching Procedures Step 1 Greetings and lead－in 　 Greet the whole class as usual.  T:　We are going to do an experiment today.　I need these things to do the experiment:　test tubes,　Bunsen burner,　salt...When we do an experiment,　we should first of all have an aim. We should use proper methods. We should find the result and draw a conclusion. Have you ever done a scientific experiment? What is the correct order of a scientific experiment? (Show the words on the screen.) conclusion　aim　result　method　　　　　　　　　　　　　　　　　　　  T:　Put the words into correct order. aim→method→result→conclusion　　　　　　　　　　　　　　　　　　　 Step 2 Motivation 　 T:　As we know quite well,　metals are very useful. What are the different uses of metals? What should we know when using metals? Which reacts most with water,　potassium or iron? You will have a better understanding of metals after reading Passage A.  (Show the three questions on the screen.) (1)What are the different uses of metals?  (2)What should we know when we use metals?  (3)Which reacts most with water,　potassium or iron? Step 3 Fast reading 　 Teacher allows the Ss a few minutes to do fast reading. T:　Who has got the answers? S:　Different metals have different uses,　for example,　steel is used in cars and iron is used in electrical equipment. T:　What should we know when we use metals? S:　When we use metals,　it is important to know how they react with different substances. T:　So we must be careful when we use metals. Who should be good at using metals? S:　Scientists. S:　Engineers. S:　Mechanics. T:　Very good! And which reacts most with water,　potassium or iron? Ss:　Potassium. T:　Do we have to keep in mind how metals react with different substances? S:　Yes. S:　Not necessarily.　It’s enough to have some common sense. We’d better leave them to the experts. S:I don’t quite agree with you. Better leave them to the people who are interested in this field of science. T:　Do you agree with him/her? Ss:　Yes. /No. Step 4 Detailed reading 　 Read the passage again. Answer the questions in Part 3 in the SB,　P44. This is a good time to enable the students to learn to read the table. Answers: (1)Potassium,　calcium and sodium. (2)It burns to form an oxide. (3)Magnesium,　aluminium and zinc.  (4)It has a slow reaction. (5)No,　it doesn’t. Step 5 Further reading 　 T:　Now read Passage A carefully to choose the best title for it. S:　The Reaction of Metals is the best title. Step 6 Language points 　 1.　It is hard to think of a world without metals. it是形式主語(yǔ),真正的主語(yǔ)為to think of a world without metals,這是英語(yǔ)中一個(gè)很重要的句型。 Ask the Ss to make some sentences,　using the pattern. It is hard to think of a world without friendship. It is hard to think of a world without electricity. It is important to read the directions before you use the machine. It is possible to build a radio without using metals.  T:　Put the sentences into Chinese one by one. 2.equipment 不可數(shù)名詞，“設(shè)備,裝備”。 (1)fire－fighting equipment 消防設(shè)備the cost of equipment 設(shè)備費(fèi)用 (2)常見(jiàn)的不可數(shù)名詞有:news新聞,information信息,advice勸告,fun嬉戲,practice實(shí)踐,furniture家具 3.When we use metals,　it is important to know how they react with different substances.使用金屬時(shí),要了解金屬和不同的物質(zhì)如何發(fā)生反應(yīng),這一點(diǎn)很重要。 (1)react with... 對(duì)……起(化學(xué))反應(yīng) Potassium reacts with oxygen easily. 鉀和氧容易起反應(yīng)。 react to...對(duì)……產(chǎn)生反應(yīng),回應(yīng) The eye reacts to the light.眼睛對(duì)光會(huì)起反應(yīng)。 He didn’t react to their words.他對(duì)于他們的話沒(méi)作反應(yīng)。 (2)substance不可數(shù)名詞， “物質(zhì)”。 a chemical substance一種化學(xué)物質(zhì) What substance does it consist of?　它是由什么物質(zhì)組成的? 4.　The reaction of metals with these substances can be put in order. put...in order 把……按順序排列 以order為中心的短語(yǔ)有: keep order 維持秩序  obey orders 服從命令say numbers in order 照順序數(shù)數(shù) in good order 井然有序out of order 順序亂的;出故障的 Step 7 Practice 　 Learn to say the names of the metals in the table. Show the real object or the picture of each metal. Step 8 Assignment 　 1.　Learn the new words by heart. 2.　Recite Passage A. 3.　Preview Passage B. Step 9 The design of the writing on the Blackboard　 Module 5　A Lesson in a Lab The Second Period react with　　　　　　　　　　　react to a chemical substance What substance does it consist of? put...in order　　　　　　　　　　keep order obey orders　　　　　　　　　　say numbers in order in good order　　　　　　　　　out of order Step 10 Activity and Inquiry 　 Steps Students’ Acting Teacher’s Organizing 1 Read through the examples and have the class repeat them after the teacher. Get the students to repeat after the teacher. 2 Answer the questions individually. Ask the students to answer the　 questions individually. 3 Put the students in pairs to compare their answers. Get the students to work in pairs to compare their answers. 4 Call back the answers from the class. Collect the answers from the class. 111