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：

Your name is Li Hua.Your pen-pal，Max，is coming from America with his parents.And he is writing to ask information about Mid-Autumn Festival.

Now you will write back at least 150 words, and in your email, you should cover the following information:

1. Long history

2.A traditional festival only Chinese celebrate

3. Family reunion

4. Mooncakes

5. Enjoying the full moon