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 Were 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】harm n.危害。常用作do harm to，意为“对有害”。harm 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 cant afford (to buy)a new coat.He cant 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. Dont 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 en