英语人教版九年级全册unit13 2a --2b.doc

指 导 教 学 书 授课时间：2017年 月 日课题： Unit13 We’re trying to save the earth. The third Period 星期（ ）累记课时：教学目标1.认知目标：90%学生掌握新学的词汇，80%学生了解海洋世界中的鲨鱼及其鳍2.能力目标：运用正确的阅读方法快速理解文章100%能在小组成员的帮助下理解课文内容 3.情感目标：培养和增强学生保护环境拯救地球的意识教学重难点1. Teaching important points: To learn key sentences and key phrases ； Understand the main information in the passage2.Teaching difficult points: Understand different tenses and voices . 教学 方法 Reading and speaking methods. 教学用具computer教 学 过 程个性修改一、互阅作业Ask the students check the homework each other. Ask them to help learn each other.二、视频导入 教师以视频导入新课，教师播放一些有关鲨鱼被切除鱼鳍，而被用来做鱼鳍羹的画片 ，使学生身临其境，播放完毕，教师引发讨论：How do you feel like?学生尝试说出自己的感受，从而增强他们的参与意识。

此时，教师自然地引出本课学习目标三、自学互帮自学提示一Contents：Section A p99 3a-3b Methods： 1.Read the passage and answer the questions.2.Read the passage and master the key phrases. 3.find out your difficulties and solve them in your group.互帮：Make a list of things that people can do to help the environment and discuss your list with your partner. 知者加速：完成的组大声朗读课文检测：分组汇报,相互补充四、讲解释疑1.harmfulharmful为形容词意为“有害的”常用作be harmful to，意为“对……是有害的”，与be bad for为同义词Smoking is bad for your health.吸烟对健康是有害的拓展】①harm n.危害常用作do harm to，意为“对……有害”。

②harm v.有危害常用作harm sb./sth.，意为“对……有害”Reading in the sun does harm to your eyes.=Reading in the sun harms your eyes.2.affordafford为动词，意为“承担得起；负担；提供”用法如下：与 can, be able to等连用I can’t afford (to buy)a new coat.He can’t afford the time for it.5． 当堂检测 细读课文并根据提示完成下列练习题（每空一分，共计20分）1. The thief was so___(残酷的) that he killed the owner of the shop.2. The dirty water is__(有害的) to your health. Don’t drink it.3. Our city aims to develop its ________(工业).4. We should make some ______(法律) to protect the environment.5. 如果他们（鲨鱼）的数量降至过低，会给所有海洋生物带来危险。

If their numbers ________ ________ ________ , it will bring danger to all ocean life.6. 没有科学研究表明鲨鱼的鳍对健康有利 No ____ ___have shown that shark fins are good for health.7. 这种方法不仅残酷，而且对环境有害 This method is ___ ____ cruel, ___ __harmful to the environment.六．Free Talk How do you feel after learning this passage? 学习这篇文章后你的感受是什么？七．最小作业量 完成练习册中巩固提升. 。