根据提供的信息和语言素材设计教学方案，用英文作答。

设计任务：请阅渎下面的学生信息和语言素材，设节25分钟的读写教学活动。

该方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：25分钟?

学生概况：某城镇普通中学九年级(初三)学生，班级人数40人。多数学生已达到《义务教育英语课程标准(2011年版)》三级水平。学生课堂参与积极性一般。

语言素材：?

Who invented tea?

Did you know that tea, the most popular drink in the world (after water), was invented byaccident? Although tea wasn't brought to the western world until 1610, this beverage wasdiscovered over three thousand years before that. According to an ancient Chinese legend, theemperor Shen Nong discovered tea when he was boiling drinking water over an open fire. Someleaves from a nearby bush fell into the water and remained there for some time. The emperornoticed that the leaves in the water produced a pleasant smell. Later he decided to taste the hotmixture. It was quite delicious. And in this way, one of the world's favorite drinks was invented.