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新教材（冀教版）八年級英語（下冊）
Lesson 25 Let’s Do An Experiment!
LESSON PRERATATION
Words and phrases:
science, experiment, fill, prove, theory, jar, upside, observe, right side up, upside down.
LESSON STRUCTURE
CLASS OPENING: Greed each other.
KEY STEPS:
STEP 1: Ask the class to discuss the questions in the “Think About It”. STEP 2: Let the students listen to the tape carefully with the following question:” Why does Danny say they should do this experiment outside?” ; “ What’s Brain’s theory? ”; “ What will Brain do?”; “Does Danny have the same theory as Brain’s?”
STEP3: listen to the tape again. The student’s better read the dialogue at the same time. After reading and listening, let the students fill in the chart by themselves.
What do we need when we do the experiment?
Water, a jar, A piece of cardboard
How do we do it?(steps)
1. fill…in…;
2. cover…with…;
3. turn…upside down.
What are Brain’s and Jenny’s theories?
1. The floor gets wet.
2. The floor won’t get wet.
Reason
discuss
Step 4: after filling it, ask the students to describe the experiment. Then, write it in the exercise-book.
Step 5. read the dialogue and act it out by the students.
Step 6. homework. Be ready to give us a morning report of tomorrow.
Language Notes:
Explain some sentences and phrases.
1.I fill a jar with water.
fill…with…
On hearing the news. Her eyes filled with tears.
2.I turn the jar upside down.
upside down
That picture is upside down.
3.I think the floor will get wet.
The days gets longer in spring.
4.I’m sure that the floor won’t get wet.
Tom ia sure that he will win the game.
5.We can prove who’s right.
My theory will prove (to be) right some day.
6.We’ll do the experiment and observe what will happen.
I observed her dance.
CLASS CLOSING:
Say good-bye to the students.
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