deaf
hearing loss
(教师展示图片四。)
t: (指着图片。) they are working in the sawmill. and it also makes loud noise. it may disturb the people nearby. they can’t sleep well.
(板书并解释，要求学生了解sawmill；理解nearby。)
sawmill
nearby
t: so noise pollution is harmful to humans’ health. right?
ss: yes.
3. (播放1a录音，学生跟读并找出文中涉及的几种噪音污染。)
t: ok. let’s listen to the passage in 1a. try to find out how many kinds of noise pollution are mentioned in the passage and what they are.
(小黑板出示答案，师生共同核对。)
5种噪音污染：
①noise from a printing factory
②noise from airports
③noise caused by loud pop music
④a loud noise made in public
⑤noise produced by cars and machines
(核对答案后，继续呈现生词。)
t: what are the bad effects caused by noise pollution?
(板书，解释并要求学生理解。)
effect
ss: it makes people sick or deaf.
t: are there any countries trying to solve the environmental problems, including noise pollution?
ss: yes, there are.
(板书，解释并要求学生了解。)
including
4. (呈现1a，学生找出疑难点，教师解释。)
(板书要点并要求学生掌握。)
no better than
step 3 consolidation 第三步 巩固(时间:10分钟)
继续巩固1a，完成1b与1c，利用关键词进行复述，提高学生的口语表达能力。
1. (根据课文内容，完成1b。)
t: ok. read 1a again and finish 1b by yourselves.
(板书并要求学生掌握rubbish；理解title。核对答案。)
rubbish, title
2. (让学生两人一组读课文，讨论1c的四个句子分别描述的是课文中的哪一段。)
t: read the passage again, and look at the four sentences in 1c. s1, please read the four sentences.
s1: …
t: which paragraphs should they belong to?
(核对答案，让学生回答这样选择的理由。完成1c。)
3. (要求学生利用小黑板上的关键词复述1a。)
t: retell the passage with the key words given. three minutes for preparation.
a. noise
b. go deaf
c. print/living near airports/no better than/in public/cars and machines
d. uncomfortable and unpleasant
e. trying to solve
(抽查几名同学，检测复述情况。教师作点评。)
step 4 practice 第四步 练习(时间:10分钟)
将1a中与噪音污染有关的内容，与现实结合，引导学生列举噪音污染的各种来源，并提出处理意见。
1. (教师用课文中的噪音污染来启发学生找出身边的噪音污染。)
t: we have learnt noise is a kind of pollution. what cause noise pollution around us?
(让学生分组讨论，教师引导学生说出身边的噪音污染。)
s1: the students in the next room are knocking on the desk.
s2: some students are talking loudly in the classroom.
s3: someone is typing the keyboard strongly.
s4: some people answer the telephone call aloud.