选修8unit2教案.docx

课题Unit 2cloning reading教材分析Reading是一篇介绍克隆技术的说明文教学目标Enable the students to identify the different types of the Noun Clauses and learn to use them.教学重点教学难点Enable the students to use the Noun Clauses.Enable the students to distinguish different types of nounclauses.教学准备A projector, a computer and a blackboard.教 学 过 程教学环节教学内容修改补充SteplPre-readingAsk students to search for some information about this topic. Now show your questionson the screen, and then let them discuss with each other.Questions about cloning:1. What is a clone?2. How is a clone produced?3. What benefits can humans gain from cloning?4. What problems may arise when humans are cloned?Suggest answers:1. It is a way of making an exact copy of another animal and plant.2. This happens in plants when gardeners take cuttings from growing plants to makenew ones, and when small parts of a plant are taken and gown in a laboratory. It alsohappens in animals when twins identical in sex and appearance are produced from thesame original egg.3. It can help cure disease and can help couples who have no baby to bear a new baby.4. There may be more bad people like HitleFast reading1. Read the text quickly and complete its main idea.The text is mainly about the 1. of animal cloning and the life of Dolly the sheep,as well as the reasons why cloning is still 2. .课题Unit3 Inventors and inventions教学目标Enable the students to describe the problem of the snakes and what has been done by thewriter to solve the problem. Make them realize it takes steps to catch the snakes and it's noteasy to get a patent.教材分析Reading是一篇记叙性的文章。

作者在文中详细介绍了从发现问题(snake trouble)、分析问题(products that might help)到解决问题(remove the snakes)的全过程,并介绍了专利申请方面的一些知识教学重点教学难点Enable the students to express their opinions aboutLearn to use the structures of expressing and supportingcloning using some useful expressions.an opinion.教学准Multi-media computer备教 学过 程教学环节教学内容修改补充SteplStep I Warming upDiscoveT: Good morning / afternoon, boys and girls!ringSs: Morning Mr...usefulT: Last class we have talked about clone, we all know it is not a dream. Now everyone, ifstructur1 give you a chance to clone what will you restore then?esS: Edison, dinosaurs, Japanese wolf, Einstein.T: Do you want to clone Hitler?Step2S: No. Hitler is a dangerous person.GramarT: If some terrorists master this clone method, they may bring disasters. All your choices1:are excellent. Today we will learn another passage about cloning, from which we will同位语know whether we can bring dinosaurs back to life.Ask the students to go through some facts of cloning.T: From these facts we know human beings have achieved great progress in cloning.Now read the text carefully to get the answers for these questions: what animals havepeople cloned?S: Frogs, mice, cows, sheep, bison, cats, and dogs.T: Good job. Answer the question: What are the common characteristics of theseanimals?Ss: They are nowadays animals.T: Yeah, I think you must have seen the film Jurassic Park, in which a scientist clonesseveral different kinds of extinct dinosaurs. Can we really clone dinosaurs now?Let the students turn to page 15 and then read the text quickly.S: We cannot clone dinosaurs, because it's difficult for us to get its DNA.T: Good job. It's only a dream. Dinosaurs disappeared 65,000,000 years ago. So thechance of dinosaurs ever returning to the earth is merely a dream.Step II Read and answer (P16)Step3Grammar 2:同位语从句To answer the questions, teacher can give the students some examples as explanation,for example, Question 1.T: Now think about this question: if in the world there is only one sheep and humanbeings want to clone more. Some days later a Dolly appears, then many more. But oneday all sheep get the same deadly disease. Now please think about what the results are.S: Maybe they would all die.T: Why?S: Because all sheep have the same arrangement of genes.T: Right. Now can you answer Question 1? Why shouldn't you clone an extinct animalunless there is enough diversity in the group?S: It is useless to clone an animal if there is not enough diversity in the group for it toovercome illnesses.T: Why is it wrong to clone an extinct animal if it would have to live in a zoo?S: If the cloned animals have to live in the zoo, it is unfair to them. They need freedom.T. Why can't you clone the DNA of animals that have been extinct longer than 10,000years?S: Dinosaurs disappeared 65,000,000 yeas ago. So the chance of dinosaurs returning tothe earth is merely a dream.Step HI Discussion (Question 2)Ask the students to have a discussion in groups, organize their words properly, and givevivid description of the chosen animals.Step4Pra。