Unit4　Globalwarming

comprehending consists of three written or oral exercises for the students to do so as to help the students to get a better understanding of the text，that is to say，to help the teacher to check how much the stude nts have understood the text.三維目標設計　　　knowledge and skills1.to know the meanings of the following new words and phrases：consume(消費；消耗；耗盡)，come about(發生；造成)，random(胡亂的；任意的)，phenomenon(現象)，subscribe(同意；捐贈；訂閱；簽署文件)，subscribe to(同意；贊成；訂購)，fuel(燃料)，quantity(量；數量)，quantities of (大量的)，tend(趨向；易于；照顧)，go up(上升；增長；升起)，per(每；每一)，data(資料；數據)，result in(導致)，trend(趨勢；傾向)，catastrophe(大災難；浩劫)，flood(洪水；洪災)，oppose(反對；反抗)，opposed(反對的；對立的)，be opposed to(反對)，consequence(結果；后果)，state(陳述；說明)，range(種類；范圍)，even if(即使)，keep on(繼續)，glance(看一下；掃視)，steady(平穩的；持續的)，steadily(平穩地，持續地)2.to learn about some facts and views about global warming.3.to learn how the information is organized.4.to develop the students' reading ability by skimming and scanning the passage.5.to develop the students' speaking ability by talking about global warming.
process and methods1.while doing warming up the teacher can lead in the topic of this unit by showing students some pictures or videos about sources of energy，making the students recall their own knowledge about energy.2.during pre－reading the teacher can go around the classroom and discuss the questions with several students.this discussion should be student－centered and lead them to the topic of global warming.the teacher should also ask the students to look at the graphs in the reading passage and try to find out the general idea of the text.3.while doing reading and comprehending，the teacher may first ask the students to read the text quickly to get the general idea of each paragraph.after reading the passage，students are encouraged to answer some questions and discuss the text structure.4.to consolidate the contents of the reading passage，the students should be required to retell the text in their own words at the end of the class.emotion，attitude and value1.to make student s realize the harm of global warming and the importance of environmental protection.2.to develop students' sense of cooperative learning.教學重、難點　　　1.to enable the students to learn about global warming and to develop their reading ability.2.to enable the students to talk about what we should do to prevent global warming.