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书
设
计Unit 2 There are forty students in our class.
Lesson 7
eleven twelve
twenty 21=20+1= twenty+one=twenty-one
How many students are there in your class?
Twenty-nine.教学过程：Teaching Procedures：对学生的预设内容：Step1: Revision
1. Greeting. How’s the weather today?
2. The whole class count from one to nineteen.lead out the word:twenty.
Step 2: Lead in
1.Learn the new word:
Students learn the new word: twenty.
Teacher writes on the blackboard.
Students read, spell and write one by one.
Lead in the word: twenty-one, 20+1=20 Twenty and one is twenty-one.
With the same way to learn the other words: twenty-two, twenty-three ,twenty-four, twenty-five ,twenty-six ,twenty-seven ,twenty-eight, twenty-nine
look at the screen : How many children are there in the picture?
Let students to count,learn the word eleven.A student writes on the blackboard.
With the same way to learn the other word: twelve
Learn the new sentences:
T: How many students are there in your class? （调查班中实际有多少学生）
Ss: There are . Teacher writes the number on the board.
Review the sentence pate :There are /is ......
T: what’s this?
Ss: It’s a bedroom.
T: What’s in it?
S1: There is a /an...
S2: There are three ....
从1数到19，有的学生已经学会20怎么说的了，因此说到19后。可能会有学生说出Twenty,此时趁机教学twenty较好。Step3: Presentation