Teaching contents and aims:
1.        Be able to listen, read and say the numbers: 13-20
2.        Be able to listen, read and say the sentences: What’s… plus/minus…? It’s…. That’s right./ Sorry, you’re wrong.
3.        Be able to solve the plus and minus questions in English.
Teaching importance and difficulties:
The same to 1,2,3
Teaching tools:
Tape, cards, CAI, question paper
Teaching steps:
Step1. Organization
1.        Enjoy a number song
2.        Greeting
3.        Do the tiger jump
Step2. Revision
1.        Count the numbers from 1to 20
2.        Show the number cards(teach: That’s right./ Sorry, you’re wrong.)
Step3. Presentation
1.        What’s …plus…? It’s….
①T show some pencils in hands: How many pencils can you see in my left/right  hand?(4/2)
Teach: What’s four plus two?(CAI)
Teach plus(card) first, then the whole sentence. Let some Ss read, then S-T answer. Pair work.
② Practice
a.        One picture(bird, 6+2)
b.        Talk about three pictures with partner
2.        What’s… minus…? It’s….
①Apple tree: How many apples can you see in the tree? Drop some one, how many left?
Teach: What’s eight minus four? It’s four.
The same way to plus
②Practice
Do some minus questions from the computer
Step4 Drill
1.        Group work (4 in a group ask and answer some plus and minus questions)
2.        Talk about one picture, use How many…can you see? What’s… plus/minus…? It’s….
3.        Game
Step5 Homework
1.        Read Unit5 after the tape
2.        Give ten plus and minus questions
Writing:
Unit 5 Plus and minus
What’s… plus…?
It’s….
What’s…minus…?
It’s….
That’s right. √
Sorry, you’re wrong.×

公开课已经结束，还算圆满，结果还闹了个笑话，才上课居然头饰的绳子断了，我晕，不过总算一笔带过，结果好一切都好吧：）

祝贺楼上的啊！谢谢分享你的教案