文档介绍：英语微课教学设计
上传: 朱玲 更新时间:2021—11-25 18：49：16
一．教材分析
教学内容
本单元的中心话题是“克隆”，学生通过讨论和阅读有关克隆的内容，理解克隆的含义、克隆的技术开展、克隆对人类带来的好处和人类对e. think about how they differ。 （精品文档请下载）
student: i think the twins and a strawberry plant are natural clones; the dolly sheep and growing new plants are man-made。（精品文档请下载）
after several minutes， teacher ask some questions and let students answer these questions。（精品文档请下载）
teacher: 1。 dolly the sheep。 it’s the most famous sheep in the world. do you know how dolly is different from other sheep？（精品文档请下载）
student: she was cloned while the others were born naturally. it is the copy of another sheep.（精品文档请下载）
teacher: 2。 what can you see in the picture?
student： i can see a strawberry plant producing runners in a natural form of cloning。（精品文档请下载）
teacher： cut the stem off the plant？
student: a gardener. and the gardener is going to put it into a pot to produce another plant。 he is actually making a copy of the plant.（精品文档请下载）
teacher： 4。what do you know about twins？
student： there are twins of the same sex and those of different sexes。 the twins here are identical in sex and appearance and are good examples of natural clones。 they carry the same genetic information. the fertilized egg has split into two while inside the mother， and so produced two identical human babies。（精品文档请下载）
step ⅱ pre-reading
［设计意图]
通过阅读文章标题，引导学生对课文内容进展预测,调动学生已有的背景知识，使其产生阅读的兴趣，快速进入阅读状态。然后让学生通过快速阅读来验证自己的预测，使自身处于一种主动认知的状态.（精品文档请下载）
before class， ask the students to search for some information about this topic. now show my questions on the screen， and then let them discuss with each other。
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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。 a clone is an animal or plant produced naturally or artificially from the cells of another animal or plant and is exactly the same as it.（精品文档请下载）
2. the cloning of plants