Unit 10 When was it invented?The First PeriodTeaching Aims and Demands1. Knowledge Objects(1) Key Vocabular：y invent(2) Target LanguageWhen 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 skillswith the target language.3. Moral ObjectsMany important inventions have changed the world a lot. Do you know the inventors of them? And when were they invented?Teaching Key Points 1Key Vocabulary：invent 2Target LanguageTalk about the history of inventions.Teaching Difficult Points1. Train the students to talk about the history of inventions.2. Train the students to understandthe target language in spokenconversation.Teaching Methods1. Listening.2Groupwork. 3Pairwork.Teaching Aids1A tape recorder.2. Some pictures or real objects of the inventions.Teaching ProceduresStep Revision1Revise 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 1aThis 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.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.1Ss: When was the computer invented? T: Good. Now Tom, what is your guess? S : 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 theycomplete the lesson.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.Read the instructions again to the students. Remind them to remember the inventions from first to last.Then have the students talk about the five inventions in groups of four, using the sample conversation as a model.Ask several groups to tell the class their answers. The rest of the class listen to them and show they have different answers by raising their hands.In the next activity you will find out the real dates.Step 1bThis activity gives students practice in understanding the target language in spoken conversation.Get the whole class to read the instruction together.Call the students” attention to the five inventions in the picture. Ask five students to say the names of them.Then ask them to see the five dates with a blank line in front of each. We”ll listen to a girl and a woman talking about the five inventions.They will talk about when they were invented. Listen carefully and match the inventions and the dates. Write the correct letter in front of each date as the sample given. Ask them to have a look at the sample answer.Tell them the answer in front of 1876 is d. That means that the telephone, which is letter d, was invented in 1876. Play the recording the first time.The students only listen and try to catch the main idea.Play the recording a second time. Let the students match theinventions and the dates. Check the answers by asking several to say the answers to the class.If some of the answers are hard to get for the children, tell them not to worry and they will make it next.Then play the recording again. Pause after each sentence and let the students repeat. For some difficult sentences, get the students to repeat several times. Be sure that they make everything clear.Answersd 1876 a 1885 e 1927 c 1971 b 1976Step 1cThis activity provides guided oral practice using the target language. Read the instructions and point to the list of dates in Activity 1b.You will be talking about the dates things were invented with a partner.Call the students” attention to the example in the box. Ask a pair of the students to read this conversation to the class.S : When was the telephone invented?AS :I think it was invented in 1876.BWrite the conversation on the blackboard. Then get the students topractice in pairs, using the information in Activity 1b. Tell them to do it like this:Student A, covers the dates. Students B, asks Student A when the things in the picture above were invented. Then change roles and practic