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1、Unit 4 Amazing ScienceTopic 3 I dont think aliens can be found in space.Section DThe main activities are 1a and 4. 本课重点活动是1a和4。. Teaching aims and demands 教学目标1. Learn some new words and a phrase:beyond, separate, hand in2. Review the use of “modal verb + be + P.P.”3. Talk about our planet and livin
2、g things on other planets. . Teaching aids 教具多媒体课件/教学挂图/录音机/幻灯片. Five-finger Teaching Plan 五指教学方案Step 1 Review 第一步 复习(时间:7分钟)通过图片造句，复习本单元重点语法项目含有情态动词的被动语态，然后通过判断句子正误的方式巩固Section C，导入新课。1. (多媒体展示一些图片，学生们根据图片内容造句，该句子必须是“情态动词+被动语态结构”，复习本单元语法。)T:Hello! Boys and girls, in this topic we have learned a new
3、 grammar, the passive voice with modal verbs. Now, lets look at the screen. Make some sentences according to the pictures. Please remember that you should use “modal verb + be + P.P.” Do you understand?Ss:Yes. T:(多媒体呈现一个很脏的教室。) Here is a classroom. S1, can you make a sentence?S1:Yes. The classroom s
4、hould be cleaned every day. T:Good. Lets look at next one. (呈现一幅环境污染图片。) S2, please?S2:The environment must be protected by us. T:Excellent. Next one. (呈现一辆坏了的自行车图片。) S3, you please!S3:The bike should be repaired. T:Good. Next.(展现一幅小孩用脏兮兮的手吃苹果的图片。) Who can make a sentence?S4, can you? S4:Her hands s
5、hould be washed before eating apples.T:Right. Lets look at next one. (呈现一片被砍伐的树林图片。)S5:The trees shouldnt be cut down by people. T:OK, next. (展现科学家们正在认真做研究的图片。)S6:Scientific research must be done carefully. T:You did very well. Have you mastered the new grammar?SS:Yes. 2. (多媒体制作几句动漫的声音。让学生判断波利说的上一节课
6、学过的关于火星的内容是否正确。激发学生的兴趣，达到复习的目的。)T:Boys and girls. Weve learned something about Mars. Do you still remember?Ss:Yes. T:Lets listen to what Polly says. Are her expressions about Mars right or wrong?Polly: Mars goes around the earth at a distance of about 228 million kilometers.Ss:No, you are wrong. Pol
7、ly: It is one fourth as big as the earth. Ss:No, its about half as big as the earth.Polly: Mars looks like a red and black ball. Ss:No, it looks like a red and orange ball. Polly: It is very beautiful. Ss:Yes. Polly: A person weighs 120 kilos on the earth, but only weighs 48 kilos on Mars. Ss:Yes, y
8、ou are right. Polly: The temperature on Mars is between -120 and 20. Ss:No, its between -138 and 28. Polly: It takes a spaceship from the earth about eight years to reach Mars when the two planets are closest to each other. Ss:No, eight months, not eight years. T:OK, boys and girls, you did very wel
9、l. As we know, Mars is the fourth planet from the sun in our solar system. This lesson, lets go on talking about solar system.Step 2 Presentation 第二步 呈现(时间:14分钟)利用太阳系的图片学习生词，导入新课，呈现1a，完成1b。1. (出示教学挂图太阳系，让学生们从感官上认识太阳系，教师导入新课。)T:Boys and girls, just now we talked about Mars. Do you know how many plane
10、ts there are in the solar system?Ss:Yes. There are eight.T:Right. The solar system is like the home of the eight planets. Our planet, the earth, is the third planet from the sun. However, the solar system is a small part of the universe.(板书并要求学生理解。)universe T: Scientists have sent up spaceships to e
11、xplore other planets in the solar system. Whats more, some spaceships have gone beyond the solar system. (板书，讲解并要求学生掌握。)beyondT: Scientists will do more research on the space. So boys and girls, you must study hard, and try your best to make a contribution to the research one day. Do you think so?Ss
12、:Yes, we will study hard. T:OK. Next, lets read the text to learn more about the solar system. 2. (学生打开课本，听1a录音并跟读，回答下列问题。)T: Boys and girls, lets listen to the tape. Read after it, then answer the following questions:(幻灯片出示问题。)(1) Has anybody found life on other planets?(2) Whats called the solar s
13、ystem?(学生听后回答问题，教师核对答案，必要时可再放一遍录音。)3. (让学生读1a, 选出恰当的标题。然后完成1b。)T:Read 1a again. Choose the best title of the passage, then finish 1b。(学生完成后，核对答案。)T:Now, which one would you like to choose?Ss:Is There Life out There?T:Yes, good. Now look at 1b. Who can match the letters with their names according to
14、1a? S1:(B) the solar system(D) the earth(A) the universe(C) the sunT:OK, you did very well. Step 3 Consolidation 第三步 巩固(时间:8分钟)要求学生运用关键词复述课文，巩固1a。小组活动，完成2。1. (学生再读1a，教师板书本课关键词和短语。)T:Boys and girls, lets find out the key words and phrases of the passage. (板书)scientists, life, millions of years, on ot
15、her planets, the earth, seven, the solar system, universe, launch, beyond, discover, message, information, alone2. (根据板书的关键词，引导学生复述课文。)T:Look at the key words and phrases on the blackboard. Can you retell the text?Ss:Lets have a try. T:OK. Life, millions of years. Ss:There has been life on earth for millions of years. T:On other planets. Ss:We havent found life on other planets yet. T:The earth. Ss:The earth is a planet and it goes around the sun. T:Seven. Ss:There are seven other planets that also go
