人教版高中英语必修2《ONTENTS Unit 3 Computers Learning about Language》公开课教案_12

必修2 unit3 Computer
教学目标
1. To know something about computers.
2. To learn and talk about computers.
教学重点
(1)使学生了解计算机的发展历程，及其在当今社会的广泛运用；
(2)使学生了和掌握现在完成时的被动语态的用法；
(3)鼓励学生用英语表达自己的观点，进行简单的推理和做出决定。

教学难点
(1) 教会学生通过时间的先后顺序来表达一件事；
(2)让使学生了和掌握现在完成时的被动语态的用法；
（3）学生自己发现并感悟相关的语言规律，在学习过程中培养语感。

教学方法
Individual, pair or group work to make every student work in class.
教具准备:A recorder,small blackboard
教学过程和方式
Step 1 Lead-in
Ask and answer the three questions between T and the Ss.
Step 2 Speaking
Talk about the pictures in pairs or groups.
Step 3. Reading
1. Skimming
Purpose: 1. To get a brief understanding of the text.
2. To train the students’listening ability.
First, let Ss skim the text and then listen to the recording of the text. Pay attention to the pauses and pronunciation.
2. Scanning
Purpose: To get Ss to have some details in the text.
Now we are to read the text again and underline all the expressions in the text. Write them down in your notebook.
3. Further Reading
Purpose: To get Ss to get more details about the text.
Read the text again and find the information to complete the table, which describes the development of computer.
1642: ___________________________________________________ 1822: The Analytical Machine was made by Charles Babbage.
____: ___________________________________________________ 1940s: ___________________________________________________ _____: The first family of computers was connected to each other.
1970s: ___________________________________________________ Now: ___________________________________________________ Step 4. Retell
Purpose: To have a deep understanding of the text.
Ask Ss to use the chart above to retell the development of the computer. One possible version:
I, a computer, was a calculating machine in 1642 in France. Then I was built as an Analytical Machine in 1822, which was a technological revolution. I became a “universal machine”in 1936 to solve any mathematical problem. I was not very big at first then I became huge, the size of a large room before I was made smaller and smaller.
Getting new transistors, later very small chips I changed my shape. I was connected with other computers and turned out to part of a network in the early 1960s. In 1970s I was brought into people’s homes, and came the Internet.
Step5. 作业设计
1. Write a short passage about the development of computers.
2. Finish Ex1 (P19), Ex2 (P20).。