约2420字。

　　Topic 3  The world has changed for the better.
　　Section B
　　The main activities are 1a and 3. 本课重点活动是1a和3。
　　Ⅰ. Teaching aims and demands
　　1. Learn some new words and a phrase:
　　in need, medical, treatment, provide, conversation, secretary, engineer, fisherman, dead, army, wound, granddaughter, grandchild, ache, fire, stairs, downstairs, board
　　2. Learn some useful sentences:
　　(1)Once they find people in need, they decide on suitable ways to help them.
　　(2)The program also provides them with nice houses.
　　3. Go on learning the present perfect tense with “for” or “since” and find the differences between the present perfect tense and the simple past tense:
　　(1)Bobby left the park two hours ago/at 8:00.
　　(2)Bobby has been away from the park since 8:00/for two hours.
　　4. Learn about word formation: compounds.
　　5. Learn to help homeless people.
　　Ⅱ. Teaching aids 教具
　　单词卡片/小黑板或幻灯片/图片(流浪者/灾难)/录音机/多媒体
　　Ⅲ. Five-finger Teaching Plan
　　Step 1  Review
　　复习for, since在现在完成时中的用法及派生构词法，引出合成构词法并导入新课。
　　1. (师生问答，复习for, since的用法。)
　　T: Wang Tao went to Beijing and lived there in 1999. How long has he been there?
　　Ss: For ten years.
　　T: Right. I has taught in this school since 1995. How long have I been in this school?
　　Ss: For about fourteen years.
　　2. (教师用上节课给单词穿“靴”戴“帽”的小游戏复习派生构词法。)
　　T: Let’s play a game to review the derivations.
　　T: Who can put on “hat” for “obey”?
　　S1: I can. dis + obey = disobey.
　　T: Who can put on “shoes” for “home”?
　　S2: I can. home + less = homeless.
　　T: Who can put on “hat” and “shoes” for “friend”?
　　S3: I can. un + friend + ly = unfriendly.
　　…
　　3. (引出合成构词法，导入新课。)
　　T: Boys and girls, do you think English words are very interesting?
　　Ss: Yes.
　　T: We can form new words by adding prefixes or suffixes to the words. Now let’s learn another word formation: compounds.
　　Step 2  Presentation