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　　Unit4 Look into Science
　　Lesson 25: Let’s Do an Experiment
　　Teaching Content:
　　1.Mastery words and expressions: science, experiment, fill, prove
　　2.Oral words and expressions: theory, jar, upside, observe, right, side up, upside down
　　Teaching Aims:
　　1.Use the Simple Present Tense.
　　2.Express certainty and uncertainty
　　Teaching Important Points:
　　Learn to express sequence;
　　How to express an experiment.
　　Teaching Difficult Points:
　　Express certainty and uncertainty
　　Teaching Preparation: jar, cardboard, water
　　Teaching Aids: audiotape, flashcards, jar, cardboard, water
　　Type of lesson: new lesson
　　Teaching Procedure:
　　Step1. Teacher brings the jar, cardboard and water to the class. Show them to the students and ask what experiments we can do with them. Let the students show them and explain the reasons to the students.
　　Let the students work in groups and discuss the experiments. When one group is doing the experiments, the others can asestions. The teacher can asestions, too.
　　Step2. Now let the students open their books and guess what the experiment is. Ask the students to say it in English.
　　Step3. Read the text silently and answers the following questions.
　　1.What’s a theory?
　　2.What’s an experiment for?
　　3.Did Danny read about the experiment? What is it about?
　　4.Do you think the cardboard can hold the water in the jar? Why?
　　Step4. Read the text carefully and check the answers. Explain some words and expressions to the class.
　　Step5. Listen to the tape and repeat after it line by line. Can the students’ listening good enough to hear clearly?
　　Step6. Come to “Let’s Do It.”
　　Divide the class into two groups. One group thinks the floor will get wet. The others think it won’t. Let them discuss in class. Pay attention to telling the reasons.
　　Step7. Homework
　　1.Review the next lesson.
　　2.Finish off the activity book.
　　Summary:
　　The experiment is the main part of the text. If we have time, do it in the class. Then ask them to describe what they see. Give a report to the class. If the time in class isn’t enough, let the students do the experiment after class. Then report the result to the class. The teacher can do the experiment for the students, too.