How often do you exercise

　　 目标描述

　　 通过本节课的学习学生能掌握以下基本句型:How often do you brush your teeth? I brush my teeth twice a day. 本节课的总体设计体现了新课程标准中的从学生的学习兴趣、生活体验和认知水平出发,倡导体验、实践、参与、合作与交流的学习方式和任务型的教学途径的教学理念。

　　 预想的效果是:学生感受到课堂45分钟大多数时间是在做一件有意义而且较为感兴趣的事,这种愉悦的心情促使学生自主、创造性地完成任务,即培养了学生运用英语进行实际交际的能力。这种体验和感悟是新课程标准的基本要求。

　　 教学重点和难点:

　　 合理运用本单元句型进行交际;

　　 熟练使用频率的表达方式。

　　 Lead in: let students pay attention to the importance of brushing teeth.

　　 Task 1: How often do you brush your teeth?

　　 Task 2: How do you protect your teeth?

　　 Task 3: Who is the best teeth protector?

　　 1. Lead-in 由小实验导入我们应爱护我们的牙齿。

　　 This experiment simulates the protection power of Fluoride.

　　 What you'll need:

　　 1 bottle of Fluoride rinse solution (available from your dentist, local dental supply company and some pharmacies)

　　 2 eggs 1 bottle of white vinegar 3 containers

　　 What to do:

　　 Pour four inches of Fluoride rinse solution into one of the containers and then place an egg in the solution. Let it sit for five minutes. Remove the egg. Pour four inches of vinegar into each of the remaining two containers. Put the egg that has been treated with the Fluoride into one container of vinegar and the untreated egg in the other container of vinegar.

　　 What will happen:

　　 One egg will start to bubble as the vinegar (an acid) starts to attack the minerals in the egg shell. Which egg do you think will start to bubble?

　　 2. 学生仔细的观察试验的结果。通过试验让学生意识到保护牙齿的重要性

　　 3. 由学生brainstorm保护牙齿的正确的方法。并发给学生表格在小组内对小组的成员进行问卷调查。

　　 How often do you brush your teeth?

　　 Seldom

　　 Once a day

　　 Two times a day

　　 After each meal

　　 How long do you brush your teeth?

　　 30 seconds

　　 1 minute

　　 2 minutes

　　 Longer than 2 minutes

　　 What type of toothbrush do you use?

　　 I don't know

　　 Medium

　　 Soft-bristled

　　 Extra soft-bristled

　　 Do you use toothpaste with fluorine?

　　 No

　　 Yes

　　 How often do you eat sweets?

　　 Many times a day

　　 Twice a day

　　 Once a day

　　 Once a week

　　 How often do you see your dentist for a preventive check-up?

　　 Never

　　 Once in several years

　　 Once a year

　　 Twice a year

　　 How often do you change your toothbrush?

　　 Yearly

　　 Every 3-4 months

　　 Every 6 months

　　 How often do you floss between your teeth?

　　 Never

　　 Occasionally

　　 Daily

　　 4. 调查并做完报告后,小组内讨论什么是正确保护牙齿的方法, 并选出最讲究牙齿卫生的标兵。

　　 5. 扩展话题:

　　 How often do you cut your hair?

　　 How often do you cut your nails?

　　 How often do you wash your hands?

　　 How often do you wash your hair?

　　 How often do you change your underwear?

　　 How often do your have a body check?