浙江省湖州市环渚学校九年级英语 Unit 15 We’re trying to save the manatees period 2教案 人教新目标版.doc

单元（章）主题unit 15任课教师与班级本课（节）课题sectiona (2a2c),grammar focus第 2 课时 / 共6课时教学目标（含重点、难点）及设置依据. teaching aims and demands1. knowledge objects(1) key vocabularyendangered, mangrove, swamp, habitat, aquatic feed, underwater, vegetation,foot, weigh, pound(2) target languagehow big are manatees?theyre about 10 feet long and they weigh about 1 000 pounds.2. ability objects (1) train students listening ability. (2) train students speaking ability. (3) train students the ability of using grammar focus.3. moral objectwe must be fully aware of the importance of reducing pollution and protecting animals. teaching key points1. key vocabularyendangered, mangrove, swamps, habitat, aquatic feed2. target languagehow big are manatees?theyre about 10 feet long and they weigh about 1 000 pounds.3. structurespresent progressivewere trying to save the manatees.presentmanatees eat about 100 pounds of food a day.past with used tothere used to be a lot of manatees.passive voicein 1972, it was discovered that they were endangered.present perfectsome of the swamps have become polluted. teaching difficult points1. the target language2. how to train students listening ability. teaching methods1. listening method to improve students listening ability.2. pairwork to make every student work in class.3. review, explanation, inductive methods教学准备1. a tape recorder2. the blackboard教 学 过 程内容与环节预设个人二度备课（反思与纠正）step revisioncheck homework. get some pairs to act out their conversations. when they work, the rest of students also guess what animals they are talking about.step 2athis activity provides guided listening practice using the target language. look at the picture. ask, what can you see in the picture? (a manatee is in the water.)go through the instructions with the class. you will hear two people talking about manatees. listen and draw a line between each word and its definition.read the sample answer. then say, the word endangered means there arent very many of this animal left in the world. the manatee is endangered because there arent very many of these animals.play the recording for students the first time. this time students only listen to the recording carefully. play the recording a second time. this time students draw lines between each word and its definition.check the answers with the class.answers1. b 2. d 3. a 4. ctapescriptboy : can you tell us about the manatees, please?man : sure. were trying to save them.boy : why? are they endangered?man : yes. there used to be a lot of manatees, but now there arent very many of them.boy : do you know how many there are?man : at this point, there are only about 2 500 in the u. s. in 1972, it was discovered that they were endangered. since then, the government has passed laws to protect them.boy : where do they live?man : their favorite habitat is the water under the trees in mangrove swamps.boy : and why are they endangered?man : some of the swamps have become polluted. also, there sometimes isnt enough food for all of them. as you can see, theyre large. the average manatee is about three meters long and weighs about 1 000 pounds. they need about 100 pounds of aquatic feed a day.boy: aquatic feed?man: oh, thats underwater plants and vegetation. thats what they eat.step 2bthis activity provides listening practice u-sing the target language.go through the instructions with the class. look at the headings in the chart and the blanks next to each heading. you will hear the same recording again. this time listen carefully to what both people say and fill in the blanks in the chart. look at the sample answer. the two people on the recording are talking about manatees, so you write the word manatee after the words kind of animal in the chart.play the recording again. get students to fill in the blanks in the chart. check the answers with the class.answerskind of animal: manateenumbers: 2 500 in the u. s.habitat: water under trees in mangrove swamps reason why they are endangered: swamps polluted, not enough fooddescription : large, three metres long, weighs 1 000 poundsstep iv 2cthis activity provides guided oral practice using the target language. look at the sample conversation in the box. invite a pair of students to read it to the class.sa : how big are manatees?sb : theyre about l0 feet long and they weigh about 1 000 pounds.read the instructions aloud to the class. each pair of students can make a conversation using information from activities 2a and 2b. let students work in pairs.while they are working, move around the classroom, checking the progress of the pairs and offering help as needed.when students finish the work, ask one or two pairs to say their conversations to the class.conversation 1sa: where do manatees live?sb: they live in the water under the trees in mangrove swamps.conversation 2sa : why are manatees endangered?sb : because some swamps have been polluted. and there isnt enough food for all the manatees, either.step grammar focuslook at the grammar focus box. invite five students to read the statements to the class.were trying to save the manages. manatees eat about 100 pounds of food a day.there used to be a lot of manatees. in 1972, it was discovered that they were endangered.some of the swamps have become polluted.put the class in five groups and ask each group to become experts in one of the verb tenses and presents a review of that tense to the rest of the class. have the students explain what the verb tense is used for and then give some sample sentences.students can look back at the units where their verb tense was presented or practiced.present progressive: reviewed throughout the book.present: reviewed throughout the book past with used to: unit 4 passive voice: unit 10present perfect: unit 14while the groups are working, walk around the classroom helping the students with their explanations and their sample sentences.ask one student of each group to show their work. as the students show their work, ask questions and correct any errors in their explanations or sentences.(1) present progressive: one form of the verbs that express action that continues over a period of time, also called present continues tense. the structure is am/is/are+ -ing. for example: he is reading a story book.(2) present: it is used for indicating action that is usual and habitual. the form of the verb is do or does. for example:i go to school by bike.she does her homework every day.(3)past with used to: the structure of used to + inf. indicates a constant or-fr