冀教版八年级下册英语《Lesson 30 Keep the candle Burning!》精品教案

桂馥兰香

Lesson 30 Keep the candle Burning!
Learning aims:
1. Master the new words: match, light, burn, use up, shallow, candleholder, oxygen, one-fifth
2. The important sentences:
① Fill the dish half full of water.
② As the candle burns, it uses up oxygen in the air.
③ There is about one-fifth oxygen in the air, so the water rises and fills about one-fifth of the jar.
Learning important and difficult points:
half 的用法
1. adv. “部分地，一半地”，
2. adj. “半个的，一半的” half a year
Learning method:
Listen, say, read and write.
Learning steps:
Step 1. Reading
Read the new words and write.
Step 2. Listening
Listen to the tape and find out the useful expressions and the difficult points.
Step 3. Explain and writing
1.as 的用法
(1) as…as
(2) 表方式“像，按照，如同”  Run as I do.
(3) 表时间，当……时候，一边……一边；She sang as she worked.
(4) 表原因，因为
(5) 表让步，“虽然，尽管”
2. 分数的表达法：口诀：分子基，分母序，分子>1，分母加s
       e.g.   one-fifth;   two-thirds
Step 4. Doing
Master the steps of the experiment. Then ask the students to do it. Do it as describe.
Step 5. Do exercises
Step 6. Sum up
1. Master the words and expressions.
2. Master the experiment.
Step 7. Homework
As you do it, describe it in English. Then do your experiment for the class.