仁愛版初三英語上冊全冊教案2

2. (讓學生分組討論節約能源的各種方法，以舊帶新，導入新課主題。)
t: we must not only protect our environment but also save energy like electricity. now discuss this problem in pairs: what should we do to save energy?
(采用競答方式，鼓勵學生說出日常生活中所觀察到的節約能源的各種方法。)
t: well, i’m sure you have some new ideas to save energy. please tell me one by one. now let’s talk about how to be a greener person. who’s the volunteer? please hands up!
s1: don’t drive a car if you travel a short distance.
s2: write on both sides of the paper.
s3: don’t use the things that can be used only once.
s4: after we wash faces, we can use the water to wash clothes.
s5: take a cloth bag when we go shopping.
s6: turn off the tv set while we are away.
s7: …
t: well done! actions speak louder than words. if you want to be a greener person, you should do as what you say.
3. (通過學生對節能環保知識的討論，教師引出文中所講的新環保事物，出示1a的掛圖，導入新課內容，教授生詞。)
t: look at the pictures. maybe they are the new things that you haven’t known. they show us some forms of energy. some of them may do less harm to our environment. what’s it in picture a?
ss:it’s a car.
t: yes. what a beautiful car! but it looks strange, doesn’t it?
ss:yes.
t: it’s an electric car. it works well, but it’s slow and can’t run for long.
(板書并講解，要求學生掌握。)
electric (adj.) — electricity (n.)
t: what’s it in picture b? who knows it?
s8:it’s a train. it can run fast.
t: you’re right. it’s a maglev train. its advantages are quiet, fast and clean, but it’s too expensive.
(板書并解釋，要求學生理解maglev train。)
maglev train
t:  ok. let’s learn 1a and talk about other ways to produce power.
step 2  presentation 第二步  呈現(時間:10分鐘)
呈現1a，完成1b。培養學生快速查閱字典的能力和快速閱讀的能力。
1. (要求學生在字典中快速地查出1a中生詞的意思，培養學生快速查閱字典的能力。)
t: take out your dictionaries. look up the new words in 1a as quickly as possible.
(以比賽的形式檢查學生查字典的效果，看哪些同學最先完成。 板書并要求學生理解1a中生詞power, acid, nuclear, per, guide; 了解biogas, straw, efficient; 掌握technology, wheel, steel。)
power, acid, nuclear, biogas, technology, straw, efficient, per, wheel, guide, steel
2. (讓學生快速閱讀1a中的2，為每段找到正確的圖片。)
t: read the passage quickly, and choose the right picture for each paragraph.
3. (再次閱讀，判斷下列句子正誤。用小黑板或幻燈片出示句子。)
t: read the passage again, and then mark true(t) or false(f).