约8090字，共七课时。

　　Unit 15 We’re trying to save the manatees!
　　The First Period
　　Ⅰ． Teaching Aims and Demands
　　1． Knowledge Objects
　　（1） Key Vocabulary
　　manatee, cheetah, panangaroo, polar-bear, gentle, furry, enormous, playful, noisy, aggressive, spotted
　　（2） Target Language
　　I am like this animal because I am strong and intelligent． I like water, and I like to eat vegetables．
　　You’re like an elephant．
　　No．
　　You’re like a manatee．
　　Yes．
　　2． Ability Objects
　　（1） Train students’ listening ability．
　　（2） Train students’ municative petence．
　　3． Moral Object
　　Love all kinds of animals because they are our friends．
　　Ⅱ． Teaching Key Point
　　Target Language
　　Ⅲ． Teaching Difficult Points
　　1． How to train students’ listening ability．
　　2． How to train students’ municative petence．
　　Ⅳ． Teaching Methods
　　1． Didactic to learn the new vocabulary．
　　2． Listening-and-answering activity to help
　　students go through with the listening material．
　　3． Groupwork to make every student work in class,
　　Ⅴ． Teaching Aids
　　1． A tape recorder
　　2． The blackboard
　　3． A projector
　　Ⅵ． Teaching Procedures
　　Step I Revision
　　Now let’s review five different verb tenses． Can you name the five tenses? Please look at the screen．
　　Show the names of the five tenses on the screen by a projector along with a sample sentence for each．
　　present progressive: You’re reading these sentences．
　　present: We use our books every day．
　　past with used to: He used to live in the countryside．
　　passive voice: Our classroom is found at the end of the hall．
　　present perfect: We have already finished Unit 14． We haven’t finished Unit15 yet．
　　Invite a student to read the verbs in these sentences． Then get other students to briefly explain what each tense is used for．
　　Present progressive describes things that are happening right now．
　　Present describes things that happen all the time or usually happen．
　　The past with used to describes things that were a certain way in the past, but have changed now．
　　The passive voice describes things that we don’t know who did, or we don’t care who performed the action．
　　The present perfect describes recent events．
　　Get students to think of two or three more sample sentences using each type of verb． Have several students read their sentences．
　　Step Ⅱ 1a
　　This activity introduces the key vocabulary．