九年级英语上册Unit2SavingtheearthTopic2AlltheseproblemsareveryseriousSectionC教案新版仁爱版.doc

Topic 2 All these problems are very seriousSection CTeaching aims and demands1.Words and phrases: hole, form, rise, oxygen, ozone layer, radiation, directly, carbon dioxide, blanket, escape, the greenhouse effect, refer to, during this period, take away, pass through2.Sentences: (1) Forests have become deserts, so more and more sorts of animals and plants are disappearing.(2) As a result, many rivers and lakes are now dead.(3) Too much harmful radiation from the sun passes through the hole and reaches the earth directly.(4) It causes the level of the oceans to rise and the climate of the earth to change.(5) When it rains or when the wind blows, the earth is taken away.(6) The heat from the sun cant escape, so the temperature is rising.3.Grammar: indefinite pronoun and adverbTeaching procedures:Step 1 Getting students ready for learning and review1 Check the Ss homework:2 Let the Ss give a report about their own bad habits and how to make the campus better.Step 2 Lead-inPlay the cartoon video about protecting the ozone layer. Let the Ss watch and discuss what they have learnt from it. Take some notes.Step 3 Pre-reading1 Show two pictures of ozone layer and more carbon dioxide. Introduce them to the Ss briefly to teach the new words. 2 Guide the Ss to predict the main idea of the passage by the given pictures.Step 4 While- reading1 Let the Ss match the pictures with the titles in 1 of 1b, and then read paragraphs 2-6 quickly and write down the proper title in front of each paragraph.2 Lead the Ss to read paragraph 1, 5 and 6, find the words in Exercise 2, 3 and 4 and guess the meanings of them according to the content.3 Let the Ss read 1a carefully, choose the best title for the passage and finish 5 in 1b. Then complete the notes in 1c according to 1a.Step 5 Post- reading1 Let the Ss read 1a carefully, find out the difficult points, and list them on the Bb.2 Guide the Ss to retell the passage according to the first paragraph, last paragraph and the notes in 1c.Step 6 Summarizing and Assigning homework1 Let the Ss summarize what they have learned in class.2 HMK: Let the Ss search the Internet for more information about environmental problems and effects. Discuss the information in groups and take notes. Then write a passage according to their notes and 1c.Blackboard designAll these problems are very serious.Section CKey words and phrases:hole, form,rise, oxygen,ozone layer,refer to,radiation,take away,carbon dioxide,blanket, escape,during this period,pass through,the greenhouse effectSentences:(1) Forests have become deserts, so more and more sorts of animals and plants are disappearing.(2) As a result, many rivers and lakes are now dead.(3) Too much harmful radiation from the sun passes through the hole and reaches the earth.(4) It causes the level of the oceans to rise and the climate of the