仁愛版初三英語上冊全冊教案2

prevent…from=stop…from
t: let’s look at picture 3. oh, my goodness! the forest has changed into desert.
(板書并要求學生掌握短語change into；理解desert。)
change into
desert
t: please look at picture 5. what’s the weather like?
ss: it’s bad.
t: yes. the wind is blowing strongly with lots of sand. we call it sandstorm.
(板書并要求學生掌握sand；了解sandstorm。)
sand
sandstorm
t: is cutting down trees good or bad for us?
ss: it’s bad.
t: yes. it’s harmful not only to human beings, but also to animals and plants.
(板書并要求學生理解。)
human being
t: so what can we do to protect the environment? discuss in groups of four.
(給學生兩分鐘，讓他們討論。)
s1: plant more trees.
s2: stop cutting down trees.
s3: …
t: good idea. although we have done a lot to protect the environment, it’s still not enough. let’s work harder.
(板書并要求學生掌握。)
although
2. (讓學生小組討論完成1c。)
t: do you know the relations between trees, human beings and sandstorms? do you know how sandstorms come into being? now please look at the pictures in 1c and number them.
  (核對答案。)
3. (聽1a錄音回答問題。)
t: just now we talked about how sandstorms come into being. now listen to 1a, and answer the questions on the blackboard.
(板書)
(1) what’s the weather like today?
(2) what should we do to protect the environment?
  (核對答案。)
4. (讓學生分成小組，讀1a，提出不懂之處。小組內討論，解決各自提出的問題；最后全班共同討論，解決遺留問題。用此方式可以讓學生充分參與到教學過程中來，進行自主探究學習，教師做補充講解。)
  t: ok, please work in groups. find and talk about the language points and difficult points, then i’ll ask some students to give their answers to class.
step 3  consolidation 第三步  鞏固(時間:8分鐘)
教師放1a錄音，學生表演朗讀，完成1b。讓學生明白樹木在環境保護中的重要性，增強環保意識。
1. (讓學生跟讀1a錄音，并注意語音語調。)
t: now, please read after the tape. pay attention to the pronunciation and intonation.
2. (讓學生三人一組表演這個對話，稍后檢查活動成果。)
t: please work in groups of three. after a while, i’ll ask several groups to act out this dialog.
g1: …
g2: …
3. (讓學生看1b的圖片，完成1b。)
t: let’s look at the picture in 1b. make notes of trees’ functions according to 1a by yourselves.
(學生完成后，讓學生一個接一個地把答案讀出來。)
t: please read your notes one by one.
s1: …
step 4  practice 第四步  練習(時間:10分鐘)
教師展示一幅水被污染的圖片，呈現2中的新詞匯。讓學生懂得怎樣保護和節約水資源。