设计任务：请阅读下面学生信息和语言素材，设计一节课的教学方案。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 justification
教学时间：45分钟
学生概况：某城镇普通中学高中一年级第一学期学生，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：
Pompeii: The facts
August 24, in the year AD 79, began normally for the people in Pompeii, a town at the foot of?Mount Vesuvius. Farmers went out to their fields, shopkeepers set out their goods for sale, craftspeople?opened their workshops and the rich walked to the public baths while their servants cleaned their houses?and washed their clothes. Unfortunately, the end of the day was far from normal for the 20,000 citizens of?Pompeii.
Early in the afternoon, when many people were resting from the heat of the day, Mount Vesuvius?erupted. Millions of tonnes of ash, lava and pumice poured onto the surrounding hillside and over the?town of Pompeii and other towns and villages. By evening Pompeii was buried under 3-5 meters of ash and?mud, and at least 2,000 men, women and children were buried with their town.
正确答案及解析
正确答案
解析
Teaching objectives : （ 1 ） Knowledge objective
Students can master the words about volcano eruptions and the usage of "erupt".
（2） Ability objective
Students can describe natural disasters and past events.
（ 3 ） Emotion objective
Students can speak English confidently in front of the class.
Teaching Contents:
The passage is about how the city of Pompeii was destroyed by volcano eruption.
Teaching key points:
Students can master the words about volcano eruption and know how to describe a natural disaster.
Teaching difficult points:
Students can describe a natural disaster by using the words and sentence structures they have learned.
Teaching procedures :
Step 1 Lead-in （5 minutes）
The teacher can show students pictures of different natural disasters and tell them some historical facts about the disasters.
Then show students pictures of Pompeii and tell a short story about it.
（Justification:This step will warm up the class, and students will become quite curious and be attracted by Pompeii's mysteries. ）
Step 2 Presentation （20 minutes）
（ 1 ） New Words
Divide the students into 4 groups and give each group cards with names of natural disasters on them.
The teacher shall write all the vocabulary related to nature disasters on the blackboard and ask students to match descriptions with the corresponding disaster.
（Justification: This group activity helps attract students' attention and arouse their interest. They can grasp the meaning of new words faster. ）
（2） Speech
Keep the 4 groups and each group will be given 5 minutes to prepare for a 2-minute description of volcano eruption，then they shall select one group member to present it in front of the class.
（Justification:This group activity helps students memorize all the words and promote their ability of presenting in front of the class. ）
Step 3 Consolidation （15 minutes）
Call on 4 ～ 6 students to evaluate the presentations given by each group with questions like:
What do you think of the group A's presentation
Is there any more vocabulary we have learned today that can be used in that presentation
What improvements do you think they need
（Justification:This step will help students memorize the vocabularies. What's more, it will also help train students' critical thinking. ）
Step 4 Summary and homework （5 minutes）
The teacher will show the flash cards of words and sentences to lead students to read and review them again.
The homework is to describe a nature disaster with at least 10 sentences.
（Justification: The homework of writing will help students make use of the words they have learned,and strengthen their interest and confidence in learning English. ）