unit 4 topic 3 what do you know about mars 教案7（仁爱版九年级上）

1、 The 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 the new words and useful phrase:beyond, separate, hand in2. Review the use of “modal verb + be + p.p.”.3. Talk about our planet and living things on other planets. . Teaching aids 教具录音机/多媒体课件/教学挂图/幻灯片 . Five-finger Teaching Plan 五指教学方案Step 1 Review 第一步 复习(时间:13分钟)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 grammar, the passive voice with

2、 modal verb. Now, lets look at the screen. Say 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?S1: Yes. The classroom should 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。)S3, you please!S3: The bike should be repaired. T: Good. Next.(展现一个小孩用脏兮兮的手在吃苹果的

3、图片。)Who can make a sentence?S4, can you? S4: Her hands should be kept separate from the apple.T: Very good. Lets look at next one. (呈现一片被砍伐的树林。)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. (板书并要求掌握separate)separate adj./v.2. (多媒体制作一个动漫的声音。让学生判断波利说的关于上一节课学过的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 rem

4、ember?Ss: Yes. T: Lets listen to what Polly says. Are her expressions of Mars right or wrong?Polly: Mars goes around the earth at a distance of about 228 million kilometres. Ss: No, you are wrong. Polly: 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 earth, but only weighs 48 kilos on Mars. Ss: Yes, y

5、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 well. It seems that you have mastered the passage very well. Congratulations!3. (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. As we know, Mars is the fourth planet

6、 from the sun in the solar system. Do you know how many planets 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.(板书并释义。)universe n. 宇宙The solar system is a small part of the universe.Scientists have sent up spaceships to explore other planets in the solar system. Whats more, some spaceships have gone beyond the s

7、olar system. (板书，讲解并要求掌握beyond。)beyond prep.Some spaceships have gone beyond the solar system.Scientists will do more research about the space. So boys and girls, you must study hard. Then you can do something useful to help research the space one day. Do you think so?Ss: Yes, we will study hard. T: OK. Next, lets read the text to learn more about the solar system. Step 2 Presentation 第二步 呈现(时间:8分钟)1. (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

8、 the following questions:(幻灯出示问题。)(1) Has anybody found life on other planets?(2) Whats called the solar system?(学生听后回答问题，教师核对答案，必要时可再放一遍录音。)2. (让学生读1a, 选出恰当的标题。然后完成1b。)T: You 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 anyone out there?T: Yes, good. Now look at 1b. Who can match the pictures with their names according to 1a? S7: (B) the solar system(D) the earth(A) the universe(C) the sunT: OK, you did

9、very well. Step 3 Consolidation 第三步 巩固(时间:8分钟)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)life, millions of years, on other 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 the earth for millions of years. T: on other planets. Ss: We havent found life on other planets yet. T: the earth. Ss: The earth goes around the sun. T: seven. Ss: There are seven other planets that also go around the sun. T: the solar system, universe. Ss: The solar system is a small p

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