必修三unit4reading导学案讲课教案

必修三

u n i t4r e a d i n g导学

案

【学习目标】：1. To learn some useful words and expressions in the text.

2. To learn the development of life.

3. To improve some reading skills, and learn the organization of the text.

4.Train Ss’ interests in science and stimulate their love for astronomy.

【教学重点】：1. Get the Ss to know the development of life.

2. To improve the students’ reading ability.

【预习案】

一、Warming-up: discuss with your partner, and answer the following questions.

1. How many planets are there in our solar system? What are they?

_________________________________________________________________________________ ___

2. Why is the earth the only one of all the plants on which life can survive?

_________________________________________________________________________________ ___

3. Do you know where are we come from? Who are our ancestors?

_________________________________________________________________________________ ___

二、Skimming

1. Look at the title of this passage, can you predict what the passage will be about?

2. Write down the topic sentence of each paragraph.

Paragraph

1:__________________________________________________________________________ Paragraph

2:__________________________________________________________________________ Paragraph

3:__________________________________________________________________________ Paragraph

4:__________________________________________________________________________ Paragraph

5:__________________________________________________________________________

3. The text can be divided into three parts, fill in the blankets below.

Part 1(para__): _______ made it possible for life begin to develop.

Part 2(para__-para__): The ________ of life.

Part 3(para__): The development of ______.

【探究案】

一、Detailed reading

1. Read para1-2, compete the following chart.

1. Insects and amphibians appeared.

2. Dinosaurs appeared.

3. The earth became a solid ball.

4. Small plants grew on dry land.

5. Reptiles appeared.

6. Plants began to grow on dry land.

7. The earth was a cloud of dust. 8. Water appeared on the earth.

9. Shellfish and other fish appeared. 10. The universe began with a “Big Bang”.

11. Clever animals with hands and feet appeared. 12. Mammals appeared.

The right order is

_____________________________________________________________________.

二、Post-reading：think about what you have read and discuss these questions in pairs.

1. Why is it wrong to show films with dinosaurs and people together?

2. Why is the earth different from the other planets?

3. Why did plants grow before the animals came?

4. What problem is caused by human beings?

5. As a student, what little things can we do for the earth?

三、Some difficult sentences in the text.

1. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.

句子翻译：

__________________________________________________________________________

这是一个主从复合句，when在此引导_____________。主句中还包括一个what引导的

_________,what 在从句中做become的______。

2. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.

句子翻译：

__________________________________________________________________________

本句中包含了两个从句。一个是what引导的__________, what在从句中做_____ ; 另一个是that引导的________, that只起连接作用，不充当句子成分。

【训练案】

一、Translate the following words and phrases.