设计任务：阅读下面学生信息和语言素材,设计 20 分钟的英语写作教学方案。教案没有固定 格式,但必须包含下列要点：
（1）teaching objectives
（2）teaching contents
（3）key and diffcult points
（4）major steps and time allocation
（5）activities and justifications
教学时间：20 分钟
学生概况：某城镇普通中学高中一年级学生,班级人数 40 人。多数学生已经达到《普通高中英 语课程标准（实验）》五级水平。学生课堂参与积极性一般。
语言素材：
Dear Zhou Kai,
How are you? We’re doing a class survey and I have to write emails to all my pen friends in other countries.I hope you don’t mind answering these questions.
1 Do most adults smoke in China?
2 In most states in the US, it is now against the law to smoke in public buildings, such as banks and offices, on public transport and in restaurants and cafes. Is the same in China?
3 Is the government planning to change the law about smoking in public?
Hope you can answer my three questions！
Best wishes,
Paul
Teaching Contents: This lesson is from senior high school, and it mainly talks about the adult smoking issues. Paul is making a survey on adult smoking, so he writes emails to all his pen friends in other countries to seek for help.
Teaching Objectives:
(1) Knowledge objectives
①Students can master the basic structure of an email.
② Students can get more information about smoking issues in China.
(2) Ability objectives
①Students can improve their writing and speaking abilities.
② Students can express their opinion about the smoking issues in daily life.
(3) Emotional objectives
① Students can foster the interest and desire of learning English, and be fond of taking part in class activities
② Students can get the awareness of avoiding smoking and keeping a good health.
Teaching Key and Difficult Points:
(1) Teaching key point
Students can get to know how to write an email to analyze the phenomenon of smoking in China.
(2) Teaching diffcult point
Students can organize their survey results to write an email.
Major Steps:
Step 1 Pre-writing (9 minutes)
(1) Teacher shows the email of Paul on the screen, and asks students to read it with two questions:
①What are the questions of Paul?
②What’s the basic structure of an email?
Students have three minutes to finish the task and share their answers.
(2) Teacher chooses two students to read their answers for the first question, and then helps students to summarize the structure of an email: the starting address, the main body and the ending wishes.
(3) Four students in a group to help Paul to finish his survey. They need express their ideas for Paul’s questions and then exchange with the whole class.
(4) Teacher invites several groups to write down their findings on the blackboard, and asks students to arrange the writing contents.
(Justification: Group discussion can strengthen their cooperative spirit and their imaginative ability can be developed. Moreover students will get the ability to write an email to express their ideas.)
Step 2 While-writing (6 minutes)
Students need to write an email to answer Paul’s questions of adult smoking, and they have four minutes to finish their first draft. While their writing, teacher will give the instructions for their problems.
(Justification: Students will cultivate their ability of writing an article within certain minutes and their good writing habits will be formed as well.)
Step 3 Post-writing (5 minutes)
(1) Students need to check their draft by themselves and then exchange with desk-mates to do peer-editing.
(2) Teacher asks three students to read their email in front of the class and then gives them some comments.
(Justification: Editing can provide a perfect writing for students, meanwhile the comments will help students learn more from others and improve their writing ability promptly.)