设计任务：请阅读下面学生信息和语言素材，设计 20 分钟英语阅读的教学方案。
教案没有固定格式，但须包含下列要点：
(1) teaching objectives
(2) teaching contents
(3) key and difficult 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：
The Three Gorges Dam
“Walls of stone to hold back clouds and rain”
Mao zedong wrote a poem in which he dreamed of “walls of stone to hold back clouds and rain till a smooth lake rises in the narrow gorges”. Now his dream has come true. The power of the Yangtze River, which is the world’s third longest river. Has been harnessed by the Three Gorges Dam
The Three Gorges Dam, which is the biggest construction project in China since the building of the Great Wall and the Grand Canal, has been built to control flooding and provide hydro-electric power for the central region of China. The dam is nearly 200 metres high and 1.5 kilometres wide. It is the largest hydro-electric power station and dam in the world and has cost more than any other construction project in history.
Sun yat-sen, who was the leader of the 1911 Revolution, first suggested the idea of a dam across the Yangze River in 1919, Three quarters of China’s energy is produced by burning coal. In 1993, China used 1.2 billion tons of coal for heating and generating electricity.Unfortunately, burning coal causes serious air pollution and increases global warming. The dam will generate electricity equal to about 40 million tons of coal without causing so much air pollution.
The reservoir has flooded 2 cities, 11 counties. 140 towns and more than 4,000 villages. More than a million people who lived in the region have moved from their homes. Now they’re living a happy new life in different areas.
The Three Gorges area is one of the most beautiful areas of China and the project has flooded some of china’s most famous historical sites, including the Qu Yuan Temple, the Han Watchtower and the Moya Cliff carvings. About 800 historical relics have been submerged. Some of them are being removed and some are being put into museums.
Teaching type: reading class
Teaching contents: This lesson is from senior high school, and it mainly talks about The Three Gorges Dam, including its features, advantage and disadvantage.
Teaching Objectives:
(1) Knowledge objectives Students can get more information about the advantages and disadvantages of the Three Gorges Dam.
(2) Ability objectives: ① Students can improve their reading abilities through fast reading and detailed reading. ② Students can introduce the Three Gorges Dam in their own words.
(3) Emotional objectives: ① Students can foster the interest and desire of learning English, and fond of taking part in class activities. ②Students can cultivate the feelings of national pride. Teaching key and difficult points: Teaching Key point: Students can get to know information about the features, advantages and disadvantages of the Three Gorges Dam. Teaching Difficult point: How to use reading strategies to help them understand the material.
Teaching Procedures: Step 1 warming up (3 minutes) Show a poem of Mao Zedong on ppt: Walls of stone to hold back clouds and rain till a smooth lake rises in the narrow gorges. Ask students which place it is. Then show some beautiful pictures of the Three Gorges Dam. Tell students today we will have a visit here. (Justification: poem and pictures can arouse the interest of students and make students curious about the class.) Step 2 pre-reading (4 minutes) The teacher can organize a discussion: why did our Chinese people build the Three Gorges Dam? Students can have a prediction, and the teacher can ask some of them to share their ideas. (Justification: through discussion and prediction, students will be prepared for the reading class, and it will be helpful to understand the material.) Step 3 while-reading (8 minutes) 1. Fast reading. Ask students to read it quickly and find out the main idea of the passage. They will have 3 minutes to finish it. 2. Detailed reading. Read the passage again and answer the questions below: a. what’s the function of the Three Gorges Dam? b. what’s the biggest advantage of the Three Gorges Dam projects? c. What has happened to the historical relics near the Three Gorges Dam? Give them 5 minutes to read it carefully and they can discuss these questions with partners. (Justification: through reading it for twice, students can have a thorough understanding of the passage, and get the reading strategies.) Step 4 post-reading (5 minutes) Role play: four students a group. Three students can act as engineers from the Three Gorges Dam designing company and one student is reporter. The reporter will ask some questions about the Three Gorges Dam. After 4 minutes, invite some groups to show their dialogues. (Justification: here students can talk about the Three Gorges in their own words and improve their oral English.)