Unit 3 Plants教学内容分析

Chapter3 The weird world of plants -Reading 一、

章节分析（Reading section ）

（一）综述

本课文分为六段，每段介绍了一种鲜为人知的神奇的植物，分别为捕蝇草，狐尾松，地衣，巨红衫，茨马海芋和洋槐。通过学习增加了学生对植物的兴趣和扩展了视野。

本课的任务有两个：

1

对课文进行整体阅读。进一步培养学生略读（获取大意）、扫读（整理有关信息）等阅读能力。

2

增加学生对自然界植物的兴趣，引发他们对植物世界的探索。

（二）阅读目标

1

知识目标

学习课文中重点词、词组、句型和语法。

2

能力目标

提高学生的阅读理解能力和培养学生的阅读技巧。阅读准备（收集相关资料）、略读（获取大意）、扫读（整理有关信息）等是高中学生必须具备的阅读技能情感目标，在本课中予以进一步强化。

（三）教学方法

采用任务型教学法组织教学，通过比较，讨论等具体活动，达到教学效果。

（四）重点和难点

1

词汇学习

1)

核心词汇



weird



bodyguard 

excerpt



victim 

trap 

absorb 

alive/living 

once



release 

defend 

fiercely 

remove

2)

拓展词汇

(各种植物的名称)



Venus fly trap



Bristlecone pine 

Lichen plant



Giant redwood 

Dead horse arum

3)

词组和短语



prefer A to B / prefer to do A rather than do B



be trapped



be absorbed in



in weight



provide sb. with sth. / provide sth. for sb.



encourage sb. to do



in return

2

句型学习



once…, main clause



as…as …

二、

教学设计（Teaching Designs）

教学内容

Pre-reading

该阶段用一个课时完成：

1. 植物的世界对于学生而言是既陌生又神秘的，为了激发学生的学习兴趣，并对阅读进行准备，建议学生在预习课文的时候浏览以下两个网站：

1). www. green. Lagoo.com. cn

2). www. zgtszw.com 2. 邀请不同的学生在课堂中介绍他们所找到的神气的植物。

While-reading

这是本课的主体部分，也是老师要处理的重点，在帮助学生理解课文的同时，培养阅读技巧；同时处理课文中的单词，词组和句型。



Skimming 要求学生快速略读，获得课文的大概轮廓，找出课文中所介绍的六中植物名称。



Scanning

要求学生再次阅读课文，并完成Ex C. 

Further understanding 经过以上两个基础环节后，进入课文深层次的理解，找出每一种植物的特点。



Word study

通过创设情景，帮助学生理解词汇并学会运用。

教学实施建议

教学资源参考

具体处理这部分内容的建议见

[链接1 The weird world of plants 的教案

链接2 课件：The weird world of plants]。

Post-reading

1. 观看一段植物和鸟类的录像（见“birds”视频文件，并完成选词填空的练习，进一步巩固词汇。

2. 对课文的第五段进行改编，假设一个学生为茨马海芋，另一个为苍蝇，编写它们之间的对话并表演。

【链接

1】

说明：

本部分建议采用任务型阅读教学方法。通过略读、扫读、细读等不同手段来提高学生的阅读理解能力，从而培养学生的阅读技巧。

Chapter 3

The weird world of plants I．Lead-in

1 A quiz on plants

1) In summer we feel cool on the streets when the streets are lines with trees. Three trees can do the job of _____ air-conditioners running all day.

A 5

B 15

2) Plants can absorb CO2, and release O2. A man every day breathes in _____ O2, and breathes out _____ CO2.

A 750g/1000g

B 1000g/750g

3) 1.5hectares of trees could produce enough oxygen to keep _____ alive and healthy for a year.

A 24

B 48

4) Smell of some flowers and plants can drive off insects.

The smell of cucumbers can drive off _____.

The smell of onions and tomatoes can drive off _____.

The smell of jasmine flowers can drive off _____.

A flies

B cockroaches

C mosquitoes

5) When we touch the leaves of mimosas(含羞草)，their leaves will shut. If their leaves shut quickly,

it means the weather will be _____.

A rainy

B sunny

2 Ask students to introduce the weird plants in nature

II. While-reading

1 Skimming:

*what are the three plants introduced in the passage? *match the pictures (ask the students to give the key words)

2 Words and expressions (用问题引出单词) 1) insect

n.

having an adult stage characterized by three pairs of legs and usually having two pairs of wings.

Ask students to give some examples: flies, crickets, mosquitoes, beetles, butterflies, and bees.

2) victim

n.

In which situations, will people be victims?

3) trap

n. / v.

*to catch

Hunters live by trapping animals.

The yellow piece of butter help me to trap the mouse.

*a device/means to catch

a mouse trap

In the debate, we will design a trap for our opponents and let them fall in.

4) absorb

v. take in

The sponge will absorb water.

You are so clever that you absorb what I teach you.

be absorbed in: attract

In your free time, what are you absorbed in? (tell your paterner)

5) pollen n. 花粉

petal 花瓣

6) release

v. set free

release the prisoner

release the album

7) provide sb. with sth. / supply sb. with sth.

provide sth. for sb. / supply sth. to sb.

What do your parents provide you with?

8) in return for

In return for the food which the tree provides them, the ants…

In return for what the parents provide you, what will you do?

9) defend

v. keep safe from any attract or danger

defend one’s home

defend one’s country

defend …against …

defend one’s reputation

10) fiercely

adv.

adj. fierce

*having violent nature

a fierce dog (bark at everyone)

*violent

a fierce storm / competition

4 Consolidate words

Heather, an African flower, produces nectar which attracts sunbirds. The sunbirds have a special beak. They first put its beak into the flower. Don’t worry! It won’t be trapped in the flower. Once they put in the beak, the pollen will fall over. In this way, the flower provides nectar for them. In return, these birds help it pass the pollen. Of course the flower won’t be the victim and it’s not necessary to defend itself.

III. Post-reading

Suppose you are the Dead horse arum and the fly or the Acacia tree and the ant, make a conversation between them.

【链接

2】

说明：

同教案相匹配的课件。

（见The weird world of plants.ppt）

【链接

3】

说明：

与课文主旨相关的补充阅读训练篇章。

（见The biggest pumpkin.doc）