高中英语SEFC Book 2A Unit 12 教案

Allow the Ss a few moments to carry out the task. Check the answers.

3. The second listening

A.  Listening and explanation

Play the tape again.Let the Ss listen the second time. While listening, I explain the language points.  Make sure the Ss understand it.

a.    the other day = a few days ago

b    They don't get enough air:

With a bowl, only a small surface area of the water is in contact with the air. So the water does not receive enough oxygen.

c    30 cm by 30 cm by 50 cm.

      We describe two-dimensional and three-dimensional measurements using the word by. So the length of the tank is 50 cm, and the width and height both 30 cm.

e       underwater plants:

      These plants oxygenate the water and keep it clean.

d    For one thing = one reason (for putting plants in the tank)

Step 5 .  Practice and deep understanding

a. Following

Let the Ss  listen and follow the dialogue,then I ask a few pairs to act the scene in front of the class.

b. Question

Why should Kate get a large tank to keep the fish in?

(With a bowl, only a small surface area of the water is in contact with the air. So the water does not receive enough oxygen.)