Unit 4 Creatures large and small名师教学设计

Teaching Objectives:

1. To help students grasp the reading ability of skimming and scanning 2. To improve students’ abilities of getting more facts from deep reading

3. To help students make a forceful conclusion of the text after analyzing the text 4. To help students realize the useful function of spiders and cherish the relationship between spiders and humans Teaching Procedures: I. Lead-in 1. Show pictures of some insects and a spider and ask students to distinguish a spider from an insect. Spiders may look like insects, but are very different from them. One difference between a spider and an insect is that a spider is divided into two parts, the head and the abdomen. Insects have a third call the thorax. Additionally, spiders have eight legs, while insects have only six. (2) What do all spiders live on? All spiders are carnivores（meat-eaters). They eat insects or other small creatures. There are nearly 40,000 types of spiders living in all parts of the world. One of the largest spiders is the goliath spider, which lives in South America. One goliath spider measured more than 27 cm across. These spiders primarily live on birds. （3）What is your view on spiders? II. Pre-reading 1 Skimming

1) What is the Friend or Enemy mentioned in the title? A spider. 2) Whose friend is it? It’s a friend of humans.

3) And whose enemy? It’s an enemy of insects.

2. Scanning Scan the passage and match the main idea with the relevant paragraphs Brief conclusion: From the facts we may know spiders are useful creatures. III. While-reading 1. Have students answer questions on page51 to get a brief idea of the text. 2. Have students fill in the blanks about the pest control of spiders.

What is the relationship between insects, spiders and farmers? 4. Have students get an understanding of the properties of spider silk. 5. Have students get an understanding of uses of spider silk. 6. Have students get an understanding of uses of spider poison. Detailed conclusion: Spiders are enemies of insects and friends of humans. We should try to understand things in nature and not destroy them.

IV. Post-reading 1.

Have students summarize the text.

2.

Have students fill in the blanks with the proper word.

3.

Have students learn some key word in the text.

（1）

shelter n. a structure built to protect somebody or something, usually from the weather遮蔽物；庇护处

Food, clothing, shelter and transport are basic necessities. When I was walking in the street, it rained suddenly. I went to a bus shelter to escape the heavy rain.

我在街上走的时候，突然下雨了，我就到公共汽车站躲避这场大雨。

The high wall gives us some shelter from the wind. Vt. shelter sb./sth. from The fence shelters the plant from cold weather. seek/ take shelter from the rain避雨

（2）. tent n. a shelter made of cloth for people to sleep in帐篷

Are you sure you have packed the camping tent?

你确定你带野营帐篷了么？

（3）. survive v. to continue to live despite difficulties 存活；幸免于难；挺过

No one could have survived such a disaster. 没有人能够在这样一场灾难中幸存下来。

survival n. 幸存

survivor n. 幸存者

（4）. emerge v.

(a)to come out of a dark or hidden place（从暗处或隐蔽处）出现；露出

After the rainstorm, the sun slowly emerged from behind the clouds, piercing the gloom with bright rays of happiness.

暴风雨过后，太阳慢慢地从云层中露出笑脸，灿烂的阳光一扫阴霾，给人们带来欢乐。

(b) to become evident The truth emerged at the inquest. emergence n.出现

（5）. pest n. a creature that destroys plants or food 害虫；害兽；害鸟

How do farmers keep pests from hurting their crops?

农民是怎样保护庄稼不受虫害的？

pest control 控制虫害

pesticide: chemicals that kill pests

（6）web---a net of thin threads made by a spider to catch insects spin a web/make a web web---a complex, interconnected structure or arrangement

a radio or television network 无线电网或电视网

Website

（7）property n. a quality or characteristic something has性质；特性

These leaves have medicinal properties

这些叶子有药用价值。

（8）

feather---one of the things that cover a bird’s body

Birds of a feather flock together. light as a feather

（9）. elastic adj. Able to stretch and then return to its original shape有弹性的；有弹力的

Bungee jumping uses elastic cords that are similar to rubber bands.

蹦极采用的弹力绳与橡皮筋特性相似。

（10）. rubber band---an elastic loop of rubber used to hold objects together

（11）

artificial adj. Not real, made to copy something natural人工的；人造的

Nowadays, many stadiums use artificial grass on the football pitch.

如今，许多体育馆的足球场使用人造草坪。

（12）. bulletproof adj. able to stop bullets 防弹的

As the president of his country, for safety he often uses a car with bulletproof doors and windows.

作为国家总统，他出于安全考虑出行通常用带防弹门窗的车。

-proof---giving protection against waterproof

防水的

soundproof

隔音的

heatproof

隔热的

airproof

不透气的

fireproof

耐火的/防火的

earthquake-proof

抗震的

（13）vest n. a piece of clothing which covers the top of the body 背心

As winter comes, some owners of pets have them wear cotton vests for warmth.

随着冬天的临近，一些宠物的主人给他们穿上了棉背心保暖。

V. Homework 1. Do D1, D2 on page 50. 2. Rewiew the text.