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111Unit 22Lesson 3 Unnatural disastersTeaching aims1.words and phrases：2.the text3.reading strategies4.exercises about text5.vocabulary: prefixesTeaching time Two periods(两课时连堂)Teaching processStep 1 RevisionReview the new words of lesson 2 and have dictionStep 2 learn the new words 1.ask some students to read the new words first and correct their pronunciation2.play the tape and have them read after the tape3.give them a few minutes to read the new words freely, tell them if they cant read the words, encourage them to ask the teacher .step 3 reading1.before you starthave students read the key words,pay particular attention to word stress.then let them discuss the questions in pairs.2.let students read reading strategies.get their meaning.3.read to learn a)exercise 2. students read the text quickly and check their answers to exercise 1. b)exercise 3.tell students to read through the sentences first before they go back to the text and study each paragraph.then ask them to complete the exercise individually. check their answers c)exercise 4.play the cassette twice, and ask students to read the text again and answer the questionsstep 4 vocabulary: prefixes1Exercise 5a)read the instructions to the class and let students know what to dob)students do the exercise in pairs2.exercise 6a)read the instructions to the class and tell students the answers include words that are in brackets in exercise 5.b)ask some students to do the exercise on the blackboard.c)check their answers and read the sentences3.speaking:exercise 7a)give them a few minutes to discuss the questions in pairsb)go around and monitor themc)check their answersstep 5 Homework Exercise 2 in page 56111
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