约320字。
　　《Wheels》教案lesson3 Clean Machines
　　Teaching aims:
　　To pare and practise using the Present Perfect and Present Perfect Continuous tense.
　　To learn some words and expressions
　　Teaching aids: CAI
　　Teaching procedures:
　　Step1. warm up
　　 Elicit information about vehicles from students, asking them how many kinds of car they can name, what kinds of power vehicles can use, what are the advantages or disadvantages of these energies.
　　 Get students to look at the title “clean machines”“solar car racing”and guess what the text is about.
　　Step2. pre-reading
　　 Read the instruction and key words with the class. Encourage students to use their bacnd knowledge and imagination, talking about solar cars in class.
　　 Student predict what the interview is about by skimming the titles, pictures, the sentences in the pictures.
　　Step3 read to learn
　　 Read the statement through with the class and asdents to guess if they are true or flase.
　　 Students then read the interview to check their guesses.
　　 Checdents’answer by having them read out the section of the text that gives the answer and correct the false statements.
　　Step4 speaking
　　 In pairs, students role play the interview. Encourage them to practise it as a real interview.
　　 Have some pairs to present their interviews in class.
　　Step5 language study--Present Perfect and Present Perfect Continuous
　　Task1. exercise 5
　　 Students look back at the interview and plete the sentences.
　　 Checdents’answers before they match the sentences with the pi