冀教版（一起）二年级英语上册教案 Unit 3 Lesson 19 How many?

Lesson 19 How many?
一、教学内容
20 以内加减法
二、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’s …plus /minus…? It’s…
　　　　　　　　　　　　　　That’s right/Sorry , you are wrong.
三、教学重点
能听懂、会说日常交际用语 What’s …plus /minus…? It’s…
　　　　　　　　　　　　　　　That’s right/Sorry , you are wrong.
四、教学难点
1、 能听懂、会说日常交际用语　What’s …plus /minus…? It’s…
　　　　　　　　　　　　　　　That’s right/Sorry , you are wrong.
2、 能正确理解运用plus ,minus 进行加减法的运算
五、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
六、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’m fine, too. Thank you, sit down, please.
Step 2. Revision
1. T: Now , boys and girls. Today we’ll go on to learn the numbers.
First, let’s count the numbers from 1—20. OK?
(Ss count the numbers from 1—20.)
2. Ask the students count the numbers from 1—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’s play a game.
Listen and say the next number.
For example: I say “one” ,you say “ two” OK?
2. T: Now , let’s exchange. I say “two”, you say “one”.
(在游戏过程中，教师对学生的反映，做出“That’s right.” “Sorry, you’re wrong.”的评价，同时出示哭脸和笑脸的翻牌。用此法呈现新句型。)
Teach the two sentences : That’s right./ Sorry , you’re wrong.
Step4. Drill
T: Now , let’s play another game.
Look, I have many cards 1—20. I ’ll take one card . And ask a student to guess :What’ the number? Other students say :That’s right./ Sorry, you’re 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’s 10 plus 5? It’s 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” and this new sentence.
2. 教师出示算术卡片：
T: What’s 7 plus 8？
Ss: It’s -----.
T: What’s 2 plus 11？
Ss: It’s -----.
(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’s---- plus ------?
T: It’s -------.
Ss: That’s right./ Sorry, you’re wrong.
4. T: Now , look! What’s 20 minus 12? It’s 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” and this new sentence.
5. 教师出示算术卡片：
T: What’s 18 minus 4？
Ss: It’s -----.
T: What’s 10 minus 8？
Ss: It’s -----.
(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’s---- minus------?
T: It’s -------.
Ss: That’s right./ Sorry, you’re wrong.
Step 6. Pair work
A: What’s---- plus/ minus------?
B: It’s -------.
A: That’s right./ Sorry, you’re wrong.
Step 7. Competition
T: Now ,boys and girls . Let’s 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