B9M2DNAtheSecretofLife教学设计

价，并提出改进意见以完善成果。

【学生活动5】小组讨论，完成任务。每个成员都积极参与讨论，踊跃表达自己的观点，不能被动地当听众。

【设计意图】通过小组讨论，实现语言技能目标中的说和写目标，即能流利表达基因工程给我们的生活带来的利与弊，并把关键词写在卡片上有效帮助梳理辩论思路；同时又培养学生的文化意识，即针对如何利用科技造福人类提出自己的意见和看法。此外，小组成员之间可以互相取长补短，来完善自己的成果，从而培养了学生的小组合作意识。

环节五：展示成果，提升能力（预设时间5分钟）

Performance 【教师活动6】对小组展示的成果予以点拨与评价，多用鼓励性评价语让学生有强烈的收获感、成功感，进而激发兴趣并增强信心。

【学生活动6】小组代表积极展示自己小组的讨论成果，对于观点不一致的小组成果大胆予以反驳并展开辩论，对于观点一致的则可以积极补充。

【设计意图】分组讨论结束后，进行成果展示汇报。因为基因工程给我们带来的有益也有弊，所以学生会出现两种对立的观点。鼓励学生大胆表达自己的看法。学生可以充分利用小卡片，帮助自己梳理思路，也可以供写作环节做参考。因为本节课阅读量较大，所以可以把写作当做课后作业，其成果展现在下堂课进行。 【评价说明】举止大方、思路开阔、表述流畅、并尽可能多地运用本节课所学词汇、短语及句式的为优秀；举止较得体、思路较宽、能较流利表述观点的为良好。 环节五：回应目标，评价反思（预设2分钟） Self-evaluation 【教师活动7】通过自我评价和组内互评两种方式，引导学生对教学目标的五个方面进行客观评价。教师课后及时浏览学生的评价表，对自己本节课的教学也予以评价与反思。

【学生活动7】根据自己具体的课堂学习情况进行自我评价；同时真实评价组内成员的读、说、小组参与等多方面的表现。

【设计意图】通过自我评价和组内互评两种形式，客观反映本节课学习目标与任务的达成情况。这不仅有利于教师了解学生掌握情况，使本模块的后续教学更有

针对性，而且也有利于教师总结反思所采用的教学环节哪些是高效，哪些是低效，从而在日后的工作中扬长避短，再上新高。 Homework Write an article to list some advantages and disadvantages that genetics has brought us and try to explain how we can make it safe and beneficial.

【设计意图】本节课是一节将泛读与精读合在一起阅读课，所以课堂时间基本都花费在读与说上，对于写的训练不能当堂完成。鼓励学生课后完成写的任务。 【评价说明】书写美观大方、行文流畅、能合理应用课文语言点及高级词汇的优秀作品可陈列在班级橱窗，既对书写者予以肯定表扬，也给其他同学树立了榜样。

七、板书设计

succeeded reproduce enormous committed It is likely that…

pass laws ; raise people’s awareness

Book IX Module 2 DNA — the Secret of Life 课前热身学案

序号 5-1 课前学习目标：

1. To get to know some words and expressions related to DNA.

2. To get familiar with the words and expressions on Page 15 and Page 17 (Part 3). 3. To learn about two great scientists—James Watson and Francis Crick. 学法指导：自主探究 一、热身导航

1. 预习课本P15内容，完成练习1和3.

2. 预习课文Part1和Part2两部分，了解文章内容并完成Page16&17练习1&3. 二、预习成果小验收：词义配对：

commit a. someone is going to have a baby

pregnant b. to have babies of produce young plants reproduce c. to ask someone questions question (v.) d. to go with something

match e. someone who got killed or injured victim f. to kill somebody 三、热身加油站

The names James Watson and Francis Crick aren’t exactly known in every household, but these two scientists have profoundly influenced our lives. They were the first people to describe the structure of deoxyribonucleic acid(脱氧核糖核酸), better known to us as _____, which determines everything from the color of our eyes to the shape of our fingernails. Because of them we now have a much deeper understanding of how the human body works.

James Watson was born in Chicago in 1928. He graduated from University with a degree in Zoology. In 1950 he received his Ph.D. In his doctoral work, he began studying bacteria. During this study he became interested in the structure of DNA. Francis Crick was born in 1918 in England. He studied physics in college. He became interested in X-ray diffraction(X射线衍射) on proteins, a subject that also fascinated Watson. Watson and Crick met in 1951 and the two soon realized they were joined by a common goal—DNA research. In 1953 the two were able to prove the double-helix (双螺旋) structure of DNA by using X-ray diffraction techniques. They were awarded the Nobel Prize in 1962. Without their pioneering research, the structure of DNA might still be a mystery. Even though their collaboration(合作) lasted only a few years, their achievement was enough to tie their names together forever in the history of science. They paved

the way for the early detection of genetic diseases such as sickle-cell anemia(镰刀型细胞贫血), and for new scientific leaps such as animal cloning. 1. What’s the main idea of the passage?

________________________________________________________________ 2. How is the whole passage developed?

________________________________________________________________ 3. Fill in the blank with suitable words. (no more than two words)

________________________________________________________________ 4. Translate the underlined sentence into Chinese.

________________________________________________________________ 四、收获与反思

After reading the passage above, do you know more about the discovery of DNA? Can you list some uses of genetics technology?

________________________________________________________________

Book IX Module 2

DNA — the Secret of Life 课中学习学案

序号5-2

Pre-reading

Warming up

1. Show several pictures and share a true story – two families accused a hospital after they found their daughters were swapped at birth, 12 years ago.

Question: How could they convince the court that the hospital committed the

mistake?

_________________________ _______________________________

2. Show pictures of James Watson and Francis Crick and the structure of DNA. Questions: Do you know who they are?

_________________________________________________________