九年级英语上册-Unit-2-Saving-the-Earth.doc

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems. Section A Ⅰ. 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，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，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。通过本课的学习，培养学生关注环境问题的意识。 Ⅱ.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。 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。 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。 Ⅲ. The key points and difficult points 1. Key points: Words and phrases: bee, butterfly, mess, shame, several, pollute, 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 into the stream .Everything has changed. Grammar: differences between Simple Past and Present Perfect tense. 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.。 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。 Ⅳ. Learning strategies 通过引导学生在听前阅读1b和3，培养学生形成听前预测听力材料的习惯。 通过朗读1a和2，引导学生编写新的对话。 通过1c，培养学生整合对话信息的能力。 Ⅴ. Teaching aids 图片，录音机，幻灯片等。 Ⅵ. Teaching procedures Step 1 presentation Present two pictures of the West Hill and describe the changes. Teach the new words and some difficult sentences. (Show the old picture of the West Hill to the Ss) T: Look at this beautiful picture. Kangkang and his friends had a picnic there two years ago. Can you guess where it is? Ss: Yes, it’s 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,