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1、1 Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems. Section A . Material analysis 本课是九年级第二单元第一话题的第一课时。主活动是1a。1a 通过对比 “West Hill ”今昔的环境变化，引出本话题的污染问题，巩固现在完成时 与一般过去时的用法及区别。1b 要求学生能够听懂一般过去时态和现在完成时态，也就是要分清1b 所提及的词语所伴随的时间。1c 则是在阅读之 后再找出 “ 西山” 所发生的变化。 2 通过观察图片内容，结对编对话，描述污染前后的情况，进一步训练学
2、生口头表达能力和对一般过去时和现在完成 时的运用能力。 3 通过听并记录 “ 动物的生存现状” ，了解环境污染带给动物的危害，继续提高学生的听力水平。任务4 的口语表达，培养学生的说的 技能，检测对本课的掌握情况。通过本课的学习，培养学生关注环境问题的意识。 .Teaching aims 1.Knowledge aims： 掌握本课的重点词汇和短语，巩固一般过去时和现在完成时的用法和区别。 能够用一般过去时和现在完成时描述过去和现在的变化。 正确使用 there be sth./sb. doing sth. 来表达 “ 有某人 /物正在做某事 ” 。 2.Skill aims: 能听懂描述环境
3、变化的对话，区别一般过去时和现在完成时的用法。 能理解和运用一般过去时和现在完成时来进行听、说、读、写活动。 九年级上册教学案例设计 2 3.Emotional aims: (optional) 让学生了解环境污染的严重性，并树立环保意识。 4. Culture awareness: (optional) 通过课文的学习，让学生了解环境的变化，关注全球的环境问题。 . The key points and difficult points 1. Key points: Words and phrases: bee, butterfly, mess, shame, several, pollut
4、e, waste, villager, destroy, cut down, goodness, pour, see sb./sth. do sth., see sb./sth. doing sth., cut down, my goodness Sentences: What a shame! / What a mess! The flowers and grass have gone! What has happened here? There be sth./sb. doing sth. There are several factories pouring waste water in
5、to the stream. Everything has changed. Grammar: differences between Simple Past and Present Perfect tense. 2. Difficult points ： 正确使用 there be sth./sb. doing sth. 来表达 “ 有某人 /物正在做某事 ” 。 区别使用短语see sb./ sth. do sth. 和 see sb. / sth. doing sth. 。 3 能正确地以口头和书面形式区别使用一般过去时和现在完成时。 . Learning strategies 通过引导
6、学生在听前阅读1b 和 3，培养学生形成听前熟悉、预测听力材料的习惯。 通过朗读 1a和 2，引导学生模仿已有对话，编写新的对话。 通过 1c，培养学生整合对话信息，将对话转换为语篇的能力。 . Teaching aids 图片（关于校园周边环境变化对比图或者影像资料），录音机，幻灯片等。 . Teaching procedures Stage (time period) Interaction patterns Teacher activity Student activity Remarks 1 Getting students ready for learning （1 min) Cla
7、ss activity Greet and talk about the weather. Lead the Ss to discuss the right place for a picnic. T: Hi, boys and girls! Its a nice day, isnt it? Ss: Yes. T: Would you like to have a picnic with me? Ss: Id like that./Sounds great. T: So where shall we go? Greet and focus their attention on the teac
8、her. . Ss: Yes. Ss: Id like that./Sounds great. 通过谈论天气，要去野炊， 吸引学生的注意力，也符合 课文主题，使学生专注于课 堂。如果天气不好，也可以 做好周末的野炊计划。 九年级上册教学案例设计 4 Ss. Ss. 2 Lead-in (3-5 mins) Group work Let the Ss discuss where to have a picnic. Encourage them to state the reasons. T: Now work in groups, choose the best place for a picn
9、ic and tell the class why you choose that place. Ss T: OK, tell us where to have a picnic. Why? S1: I think is the best choice. The air there is fresh. We can fly kites on the grass. S2 Discuss where to have a picnic and state the reasons. Ss S1: I think is the best choice. The air there is fresh. W
10、e can fly kites on the grass. S2 先让学生讨论出合适的野炊 地点，老师再出示西山没被 污染的图片来吸引学生的注 意。当学生兴趣高涨时，又 呈现被污染后的图片，让学 生满怀兴趣和疑问去了解西 山被污染前后的状况，更好 的体会一般过去时和现在完 成时在语境中的运用，同时 也突破了单词关。 3 Pre-listening (5-7 mins) Class activity Present two pictures of the West Hill and describe the changes. Teach the new words and some diffic
11、ult sentences. (Show the old picture of the West Hill to the Ss) Watch the pictures of the West Hill, guess the meaning and pronunciation of the words according to the introduction about 在教授新单词时，老师应当 同时呈现单词和音标，让学 生运用所学音标自己解决单 5 T: Look at this beautiful picture. Kangkang and his friends had a picnic
12、 there two years ago. Can you guess where it is? Ss: Yes, its the West Hill. T: What can you see in the picture? S1: Some flowers, a clean river and a big tree T: Right. The West Hill is a beautiful place. Can you see the bees and butterflies dancing there (Point to the bees and butterflies, and the
13、n write down the words and phrases on the Bb) T: So do you want to go there for a picnic? Ss: Yes T: I d like to. But now it has changed a lot. Look at this picture. Do you like it? Ss: No. (Teacher presents the new words and difficult sentences through the description of the the changes of the West
14、 Hill. Ss: Yes, its the West Hill. S1: Some flowers, a clean river and a big tree Ss: Yes Ss: No. 词的读音问题，如果学生发 音不准，老师要及时更正。 再根据图片和讲解，引导学 生大胆的猜测词义和部分难 句的意思，为1a 中的听力对 话扫障碍。 九年级上册教学案例设计 6 picture.) 4 While-listening (10 mins) Individual work Group work Step 1: Let the Ss listen to 1a twice and do 1b al
15、one. T: Listen to the tape carefully and try to mark the words with P or N. T: Now please check answers in your group. S1: “Beautiful” is in the past. S2:“Butterflies” are in the past. S3: “Dirty ” is now. Step 2: Let the Ss listen to 1a again and pay attention to the pronunciation and the intonatio
16、n. Then practice 1a in groups and role play it. T: Read 1a with your group members and act it out. Listen and mark the words with P or N according to the tape. . S1: “Beautiful” is in the past. S2:“Butterflies” are in the past. S3:“Dirty ” is now. Listen to 1a again and pay attention to the pronunciation and the intonation. Then practice 1a in groups and role pla
