Unit 3 Lesson 17 Number 20 Step 1. Greeting Teacher: Good morning, boys and girls! Students: Good morning, Teacher. How many markers do I have? Listen to the vedio: 4,14,5,1 5,6,16,7, 17,8,18, 9,19,20 Do you know how to say these numbers in English? Step 2. Practice A: How many markers do you have? B: I have. Step 3. Lets do it. Step 4. Lets sing. 谢 谢