冀教版(一起)二上《How many?》教案
教学内容：
20 以内加减法
教学目标：
1、 巩固数词类单词 1－２０，及句型 How many ---- can you see?
2、 能听懂、会说日常交际用语 What鈥檚 鈥瀙lus /minus鈥灒� It鈥檚鈥� That鈥檚 right/Sorry , you are wrong.
教学重点：
能听懂、会说日常交际用语 What鈥檚 鈥瀙lus /minus鈥灒� It鈥檚鈥� That鈥檚 right/Sorry , you are wrong.
教学难点：
1、 能听懂、会说日常交际用语 What鈥檚 鈥瀙lus /minus鈥灒� It鈥檚鈥� That鈥檚 right/Sorry , you are wrong.
2、 能正确理解运用plus ,minus 进行加减法的运算
教具准备：
1、 数字1至20卡片，加减法的算式卡片
2、 磁带及录音机。
3、 制作相关课件。
4、 代表对错的哭脸和笑脸的翻牌
教学过程：
Step 1. Greeting
T: Hello, boys and girls.
Ss: Hello, Miss Qian.
T: How are you this morning?
Ss: Fine, thank you. And you?
T: I鈥榤 fine, too. Thank you, sit down, please.
Step 2. Revision
1. T: Now , boys and girls. Today we鈥榣l go on to learn the numbers. First, let鈥榮 count the numbers from 1鈥�20. OK? （Ss count the numbers from 1鈥�20.）
2. Ask the students count the numbers from 1鈥�20 one by one.
3. Play the number game. Look at the computer and say the number quickly.
4. Look at the computer and answer the question:
T: How many ----- can you see?
Ss: I can see ------. （ 在物品数量呈现上不是全部呈现，而是通过课件逐步递增）
5. Say a chant together.
Step3. Presentation
1. T: Now boys and girls. Let鈥榮 play a game. Listen and say the next number. For example: I say ―one鈥� ,you say ― two鈥� OK?
2. T: Now , let鈥榮 exchange. I say ―two鈥潱� you say ―one鈥潯�
（在游戏过程中，教师对学生的反映，做出鈥淭hat鈥檚 right.鈥� 鈥淪orry, you鈥檙e wrong.鈥澋钠兰郏背鍪究蘖澈托α车姆啤Ｓ么朔ǔ氏中戮湫汀＃�
Teach the two sentences : That鈥榮 right./ Sorry , you鈥榬e wrong.
Step4. Drill
T: Now , let鈥榮 play another game. Look,
I have many cards 1鈥�20. I 鈥榣l take one card .
And ask a student to guess :What鈥� the number?
Other students say :That鈥榮 right./ Sorry, you鈥榬e wrong.
（通过此游戏，既可以使学生练习两个新学句型，然后将学生抽中的4个数字：10 ，5， 20， 12贴在黑板上，也为下一步新授做了铺垫。）
Step5. Presentation
1. T: Now , look！ What鈥檚 10 plus 5? It鈥檚 15.（教师边说边在黑板上已贴的数字间填上加号和等于号。） Teach ― plus鈥� and this new sentence.
2. 教师出示算术卡片： T: What鈥檚 7 plus 8？
Ss: It鈥榮 -----.
T: What鈥檚
2 plus 11？
Ss: It鈥榮 -----.
（在两条算式结束后，不呈现算术卡片，再请学生回答两条算式： 9+10= ？ 3 +11=？）
3. Ss ask the teacher:
Ss: What鈥榮---- plus ------?
T: It鈥榮 -------.
Ss: That鈥榮 right./ Sorry, you鈥榬e wrong.
4. T: Now , look！ What鈥檚 20 minus 12? It鈥檚 8.（教师边说边在黑板上已贴的数字间填上减号和等于号。）
Teach ― minus鈥� and this new sentence.
5. 教师出示算术卡片： T: What鈥檚 18 minus 4？
Ss: It鈥榮 -----.
T: What鈥檚 10 minus 8？
Ss: It鈥榮 -----.
（在两条算式结束后，不呈现算术卡片，再请学生回答两条算式： 14-6= ？ 20-7=？）
6. Ss ask the teacher:
Ss: What鈥榮---- minus------?
T: It鈥榮 -------.
Ss: That鈥榮 right./ Sorry, you鈥榬e wrong.
Step 6. Pair work
A: What鈥榮---- plus/ minus------?
B: It鈥榮 -------.
A: That鈥榮 right./ Sorry, you鈥榬e wrong.
Step 7. Competition
T: Now ,boys and girls .
Let鈥榮 have a competition.
One group ask, and the other group answer.
（两组之间举行算术比赛，一组问一组答，一个接一个，训练学生的速度和反映能力。）
Step 8. Dialogue
Ask the students read the dialogue after the tape.
Then read it together.
Step 9. Practice （出示课件）
T: Look, what plus what is five? Can you guess?
（让学生根据课件中的算式 ？+ ？= 5，来扩展思维进行想象，回答问题）
Drill: ? + ? = 11 ? - ? = 2 ? + ? = 13 ? - ? = 7 ? + ? = 19 ? - ? = 11
Step 10. Song
Ask the students to sing a song <>
Step 11. Homework
1. Read the dialogue
2. Do the exercise book
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