怎样比较物体的轻重_高二英语教案_模板

怎样比较物体的轻重_高二英语教案_模板教学目标:1 教师应用矛盾制造法，引导学生发现问题，选择合适的方法解决问题;2 让学生认识常见的比较轻重的简单工具及其使用方法;3 让学生知道比较物体轻重的常见方法;4 让学生在实验的过程中，人人动手，分工合作，培养其团队精神和参与意识；5 在整堂课中，积极营造双语的语言氛围，让学生习得英语。

教学过程：( 英语歌曲、儿歌)一用观察、估计的方法比较物体轻重１（１）（出示字典和书）生比较，汇报（２）（出示两组陆地，海洋动物的幻灯）生比较，汇报（３）师问：为什么？你们怎么得出正确结论呢？生答２师小结：看来，根据我们已有的生活经验在非常熟悉被比较物体重量的情况下，可以用观察、估计的方法比较他们的轻重。

二用手掂的方法比较物体轻重１（１）（出示形状大小相同的牛奶盒A ,B）生比较，汇报师质疑生手掂汇报师小结：物体大小相同，重量不一定相同。

I Compare by estimation and observationThis is a ____，this is a ____. Heavy or light?Why? How do you get the answer?ⅡCompare by handsThey are two milk boxes. Heavy or light?（２）（出示大小不同的两个牛奶盒B,C）生比较，汇报师质疑，生手掂，汇报师小结：大的物体不一定重，小的物体不一定轻。

（３）师小结：这样看来，在某些情况下，我们如果只用估计和观察的方法，不能正确得出一些物体的轻重．２（１）（出示两个薯片罐红色/绿色）师问：用什么方法可以知道他们谁轻谁重呢？生讨论，汇报师：真棒！在某些情况下，最简单的方法就是用手掂一下。

生手掂汇报３(1) 师小结：用手掂这种方法，既方便又快捷，在生活中我们经常运用它比较物体轻重。

(2) 小当家：生实践，比较生活中物体的轻重三用简单工具比较物体的轻重１（１）（出示白球和黄球）师：用手掂一下生比较，汇报师质疑：大家意见不一致，看来用手掂的方法不能比较正确的确定它们的轻重。

（２）（出示橡筋、弹簧、平衡尺）师介绍三种简单的比较工具，让学生选择一种工[1] [2] 下一页Lesson 89 DialogueLesson objectives:1．Students will be able to use everyday English freely and grasp the ways of making a short telephone dialogue.2．Expressions and structures: Can I speak to…? /Sb. dials the wrong number. / Would you Like a word with…? / Fold on. I’ll go and get…3．Words and phrases: chat/ have… on / get together / all the best / have a word withTeaching aids: a recorder, a computer, a telephone, etc.Teaching procedure:A．Preparation1．Revision1) Daily report:As usual, each student says something that they are familiar with, such as film stars, pop stars, sports stars, daily life, etc. (Ex. Ⅰin AB)2) Make some brief telephone conversations with the Ss in the class, for example:T：(Use the telephone and dial the number.)S1：Hello.T：Can I .speak to Hou Ying?S1：This is Hou Ying.T：Hello. This is Wang Bing. How are you?S1：Fine. Thank you. And you?T：I’m OK. Thank you.……S2：(Use the telephone and dial the number.)T：Hello.S2：Can I speak to Shi Wei?T：I’m sorry, she’s not in. Can I take a message?S2：OK. This afternoon we’ll have a meeting at 2 o’clock in the school hall. Please tell her to attend it on time. Don’t he late.T：OK.2．PresentationTell the students in this unit we are going to learn about telephones. From this unit, you can get some information about telephones, such as How were telephones connected with each other in the past and how about today? etc.B．The body of the lesson1．Listening1) Ask the Ss what can you see in the picture? (A man is ringing somebody up) and get the Ss to tell you what they think is happening.2) Tell the Ss Today We are going to learn a dialogue between Steve and Pippa. They are talking about something.3) Teacher may say: Listen to the dialogue (Book closed.) and think about the question: What does Steve ask Pippa to do? (To go to a lecture about the universe.)2．Drill1) The students work in pairs to practise the dialogue. Walk around the room and correct pronunciation as necessary. Ask some pairs to present the dialogue to the class.2) Pair work. Complete the following dialogues. (Ex. Ⅱin AB)A：Thanks for the message.B：Not at all.A：There’s no one called Mary here.B：I’m sorry. I think I dialed the wrong number.A：Please could I have a word with her?B：Just a moment. I’ll go and get her.A：Have you got time for a chat?B：No, I’ll have to ring off now. Someone wants to use the phone.A：I’ve got sth. on tha t evening.B：What a pity!A：Are you free to come to a party on Friday?B：Just a minute. I’ll have a look to see if I’m free then.A：Is this a convenient time?B：Sure, go ahead.A：Would you like a word with her?B：Yes, please.3) You can give the following exercise.Say: We just know sth. of making a short telephone dialogue. Please tell me what we shall say when we make a short telephone dialogue?S1：Hello. Can I speak to…?S2：Hello. Is that Bob?S3：Hi, this is Steve. Is Pippa there?S4：Would you like a word with Bob?S5：Hold on.S6：I’m sorry. I think I dialed the wrong number.S7：Please could I have a word with…?S8：I’ll have to ring off now. Someone wants to use the phone.……3．Comprehension1) Ask the students to say the general meaning of the dialogue.2) New words: (Before class, the teacher made them look up these words in the dictionary and explain them both in Chinese and in English. At the same time, they can learn the usage of the word in the dictionaries.)excellent: very gooddial: an action while ringing somebodychat: a talk3) Language points:(1)Would you like a word with her? = (informal) would you like to speak to her? Would like a word /a few words with somebody = have a word with somebody eg: The boss would like a word with you in his office.(2)Hold on. = Wait a moment; don’t put down the telephone.(3)The speaker’s supposed to be excellent.Suppose somebody / something to be… = consider somebody / something to be…eg: All the classmates suppose him to be stupid. But in fact, he is a good student.Jenny is supposed to be the best student in our class.be supposed to = shouldeg: You’re supposed to start work at 8:30 every morning.Lucy was supposed to come to lunch. What happened?(4)All the best. = All the best wishes to you. = All the very best.eg: All the best in your new job.All the best with your family.4) Fill in the blanks with the new words and expressions (Ex. Ⅲin AB).(1)I dialed the wrong number yesterday, so I couldn’t find h er.(2)She is such an excellent girl that all the teachers like her.(3)Tomorrow we’ll get together at the school gate to go outing.(4)She’s supposed to come here.(5)Please could I have a word with her?(6)Mary sees Peter off at the railway station. She says to Peter: “All the best.”C．Consolidation1．PracticeDivide the whole class into four groups. And let them make up new dialogues with their partners according to the dialogue and practice. Ask the Ss to pay attention to daily expressions of telephones.Group1: Make up a dialogue between two Ss who want to watch a football match.Group2: Make up a dialogue between two Ss, one of whom doesn’t know the English homework. Group3: Make up a dialogue about visiting the Great Wall.Group4: Make up a dialogue between a teacher and a student about asking for a leave.Give the Ss a few minutes to prepare for the new dialogues. And then ask some pairs to act their dialogues out. See which group can do it well. G[1] [2] 下一页Period 3(一)明确目标1. Learn more about the present situation of the disabled people in the world. Get the students to have right understanding of the disabled people.2. Grammar study --Inversion.(二)整体感知1. Get a general idea by discussing the topic offered on page 46. Part 2 Discussion.2. Learn inverted sentences.（三）教学过程Step 1 General UnderstandingRead the text by following the tape and answer the questions:(1) How many disabled people are there in China today?[There are about 50 million people with disabilities in China today.](2) What is the new government programme about?[The new government programme is designed to help disabled people.]Step 2 Ask the students to do the following True or False questions.1. Professor Stephen Hawking who gives a talk in a lecture hall of a university uses a very strange voice because the sound he makes is produced by a computer and a voice box.2. When Professor Stephen Hawking answers the questions, he always does it very quickly because a computer can help him to do so.3. Many people come to his lecture only because they want to see how a man who can not speak uses a computer to produce the sound.4. Professor Stephen Hawking became disabled because he had a disease of the brain.5. The book written by him with the ti tle ‘”On History of Time” might be about how he continued with his research and his writing even ff he could only move the fingers of one hand.6. The passage lists many examples of successful people with disabilities; saying that the disabled people can be successful in many ways except in the fields of s tmrts.7. Those who have the wrong attitude towards people with disabilities may not realize that it is probable that one day they will end up with a disability.8. The reading passage strongly demands that the government should design more programmes help disabled people, for ordinary people can do nothing to help them.Answers: 1 ~ 4 TFFF 5 ~ 8 FFTFStep 3Discuss the following in pairs and then ask one or two groups to do state their opinions.What should we do to help people with disabilities in such eases as:1. If we axe organizing an event....2. If the blind people want to cross the road or just walk from one place to another.3. If we see someone in wheelchairs doing shopping....:(四)总结、扩展Step 4 Main ideaPart I (Paragraphs 1 ~ 2)Explain what the disability really is and the fact that some people have wrong attitude towards people with disabilities.Part 2 (Paragraph 3)Make suggestions how we should treat the disabled people properly and what needs to be done to make life easier for the disabled people,Part 3 (Paragraph 4)The Chinese government has done a lot to help disabled people in the last years.Step 5 Language focus1. Some new words and expressions.end up with: in the end they Mil...as a matter of fact: in facttotal: completesuitable for wheelchairs：Proper and easy for wheelchairs2．Some difficult sentences，Most of them can see or hear something even if not clearly·They love having lots of friends，so do those with disabilities．3．带介词“to”的动词短语：I look forward to receiving your reply．He looks forward to coming to China．be used to(doing)习惯于stick to(doing)坚持lead to(doing)导致devote oneself to(doing)献身于refer to涉及，参考turn to(doing)转向；求助于prefer 宁愿……而不…… belong to属于get down to。