设计任务：
请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，但须包含下列要点：
●teaching objectives
●teaching contents
●key and difficult points
●major steps and time allocation
●activities and justifications教学时间：20分钟
学生概况：某城镇普通中学初中一年级学生，班级人数40人。多数学生已经达到《义务教育英语课程标准（2011年版）》二级水平。学生课堂参与积极性一般。
语言素材：

Write your own note to a friend. Invite him/her to an activity in your school. Use the questions to help you.

1.What's your friend's name？

2.What does your friend like to do？

3.What activity do you have in your school？

4.When is the activity？