Unit 9 When was it invented?
The First Period
Ⅰ．Teaching Aims and Demands
1．Knowledge Objects
（1）Key Vocabulary invent
（2）Target Language
When was the telephone invented?
I think it was invented in 1876．
2．Ability Objects
（1）Teach the students to use the new words．
（2）Train the students to talk about the history of inventions．
（3）Train the students’ listening and speaking skills with the target language．
3．Moral Objects
Many important inventions have changed the world a lot．Do you know the inventors of them? And when were they invented?
Ⅱ．Teaching Key Points
1．Key Vocabulary
invent
2．Target Language
Talk about the history of inventions．
Ⅲ．Teaching Difficult Points
1．Train the students to talk about the history of inventions．
2．Train the students to understand the target language in spoken conversation．
Ⅳ．Teaching Methods
1．Listening．
2．Groupwork．
3．Pairwork．
Ⅴ．Teaching Aids
1．A tape recorder．
2．Some pictures or real objects of the inventions．
Ⅵ．Teaching Procedures
Step I Revision
1．Revise the language points in Unit 9．
Ask some students to say something about Tina and the stories happened on April Fool’s Day．Encourage them to use the Past Perfect Tense．
2．Check the homework by asking some students to share the sentences they made with the verbs with the class．
Step Ⅱ1a
This activity reviews vocabulary and introduces new vocabulary which can be used to talk about inventions．
Read the inventions to the students．
Call the students’ attention to the five pictures, Tell the students that all of these things were invented in the last 150 years．
Point to each picture and let the students tell what it is．
Write the names of the five inventions on the blackboard．
computer, car, calculator, telephone, TV set
Have several different students guess and write the dates on the board．
Ask the class to repeat the questions and answers like this．
T: When was the computer invented?
Class repeat．
SS: When was the computer invented?
T: Good．Now Tom, what is your guess?
S1: 1965．
T: OK．Tom, repeat after me．The computer was invented in 1965．
T: Class, please repeat．
SS: The computer was invented in 1965．
Repeat the process with several different inventions．
Tell the children that they will find out the real dates after they complete the lesson．
After that, ask the students the questions below:
Questions:
1．Which one do you think is the oldest?
2．Which one is the newest?
3．Which one do you think is the oldest or the first invention?
4．Which one is the newest or last invention?
Ask different students to answer the questions．
Have the students look at the example conversation in the box．Ask two students to read this conversation to the class．
A: I think the telephone was invented before the car．
B: Well, I think the telephone was invented after the car．
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